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Applications
- Aerospace Engineering
  - Aerospace Design, Operation, and Maintenance
    - Aircraft Design and Manufacture
    - Aircraft Emergencies
    - Aircraft Flight Manual
    - Aircraft Inspection
    - Aircraft Maintenance and Repair
    - Aircraft Operations
  - Aerospace Facilities
    - Airfield and Airspace
      - Airparks
      - Airport Ramps and Aprons
      - Runways
      - Taxiways
    - Clean Rooms and Controlled Areas
      - Clean Room Equipment and Materials
      - Clean Rooms
      - Controlled Areas
  - Aerospace Materials
    - Ablative Materials
    - Aerospace Fluids
      - Propellants
    - Aerospace Transparent Materials
      - Aerospace Transparent Heating Elements
      - AerospaceÂ Interlayer Materials
    - Aircraft Maintenance Chemicals
      - Aircraft Cleaning Chemicals
  - Aerospace Personnel and Training
  - Aerospace Structures and Systems
    - Aerospace Transparent Enclosures
      - Aircraft Windscreens
      - Canopy
    - Aircraft Cabins
    - Aircraft Components
    - Aircraft Engines and Propulsion Systems
      - Aircraft Engines
      - Aircraft Fuel Systems
      - Electric Propulsion Systems
      - Reciprocating Piston Engines
      - Turbine Engines
    - Aircraft Structures
    - Aircraft Wheels and Tires
    - Airframes
    - Airplane Electrical Wiring Systems
    - Takeoff and Landing Systems
  - Aircraft
    - Airships
    - General Aviation Aircraft
    - Light Sport Aircraft
      - Small Airplanes
    - Light Sport Aircraft -- Fixed Wing
      - Airplanes
      - Gliders
      - Weight Shift Control Aircraft
    - Light Sport Aircraft -- Lighter-than-Air Craft
      - Balloons
    - Light Sport Aircraft -- Power Parachutes
    - Light Sport Aircraft -- Rotorcrafts
      - Gyroplanes
      - Helicopters
    - Military Aircraft
    - Unmanned Aircraft Systems
      - Small Unmanned Aircraft Systems
  - Aircraft Regulation and Certification
    - Aircraft Regulation Authorities
    - Airworthiness
    - Licensing and Certification
      - Pilot Registration and Licensing
  - Avionics
    - Aircraft Sense and Avoid Systems
    - Aircraft Vision Systems
      - Goggles
      - Head Up Displays
    - Angle of Attack Systems
  - Space Simulation
  - Space Vehicles
    - Launch and Reentry Vehicles
    - Rockets and Missiles
    - Spacecrafts
- Agricultural Engineering
  - Adjuvants
  - Agricultural Liming Materials
  - Agricultural Residues and Wastes
  - Biological Control Organisms
  - Biopesticides
  - Farming
    - Irrigation
  - Fertilizers
  - Pest Control
    - Invertebrate Pest Control
  - Pesticide Delivery Systems
    - Application Apparatus
      - Anticoagulants
      - Dispersants
      - Field Atomizers and Sprayers
      - Granular Applicators
    - Pesticide Application
      - Aerial Application
      - Ground Application
      - Topical Application
  - Pesticide Drift
    - Spray Drift
  - Pesticide Ingredients
    - Active Ingredients
    - Inert Ingredients
      - Carriers
  - Pesticides and Alternative Control Agents
    - Antimicrobials
      - Antibiotics
      - Antivirals
      - Disinfectants
    - Attractants and Repellents
      - Mosquitoe Repellents
    - Fumigants
    - Herbicides
    - Insecticides
    - Microbicides
      - Fungicides
    - Piscicides
    - Rodenticides
  - Pesticides Formulation
    - Dry Formulation
      - Granules
      - Pellets
    - Liquid Formulation
      - Aerosols
      - Emulsifiable Concentrates
- Asset Management
  - Asset Data Management
    - Property Receipts
    - Property Records
  - Asset Priority Index
  - Asset Process Management
    - Property Categorization
    - Property Identification
    - Property Movement
    - Property Risk Management
    - Property Storage
    - Property Tracking
  - Property Acquisition
  - Property Management Maturity
  - Property Management Systems
  - Property Reutilization and Disposal
    - Property Damage
    - Property Disposal
    - Serviceable Equipment Components
  - Sustainable Property Management
  - Tangible Property
    - Real Property
      - Moveable Property
- Automotive Engineering
  - Automobiles
    - Commercial Vehicles
    - Passenger Vehicles
  - Automotive Components
    - Automotive Brake Systems
      - Anti-Lock Braking Systems
    - Engine and Ignition Systems
      - Automotive Fuel Systems
      - Compression Ignition Engines
      - Engine Cooling Systems
      - Spark-Ignition Engines
    - Exhaust Systems
    - Suspension and Axle Systems
    - Vehicle Safety Systems
      - Airbags
    - Vehicle Transmission Systems
  - Automotive Materials
  - Diesel Exhaust Fluids
  - Tires and Wheels
    - Light Truck Tires
    - Passenger Vehicle Tires
  - Traffic Monitoring Devices
- Biomedical Engineering
  - Anesthetic and Respiratory Equipment
    - Anesthetic Equipment
    - Humidifiers
    - Patient Warming Equipment
    - Ventilators
  - Biomaterials
    - Surgical Adhesives and Sealants
  - Biomechanics
  - Diagnostic Equipment
    - Clinical Thermometers
    - Endoscopes
  - Fixation Devices
    - Neurosurgical Fixation Devices
    - Orthopedic Fixation Devices
    - Spinal Fixation Devices
  - Grafts
    - Bone Graft and Graft Substitutes
    - Vascular Grafts
  - Medical Accessories
    - Medical Gloves
    - Surgical Drapes and Gowns
  - Medical Imaging Techniques and Examination
    - Diagnostic Radiography
    - Magnetic Resonance Imaging
  - Medical Surgical Suction and Drainage
    - Catheters
    - Medical Suction Devices
  - Medicine
    - Anesthesiology
    - Regenerative Medicine
  - Reusable Medical Devices
  - Surgery
    - General Surgery
      - Vascular Surgery
    - Orthopedic Surgery
      - Arthroplasty
      - Vertebrectomy
  - Surgical Implants
    - Cardiovascular Implants
    - Cochlear Implants
    - Mammary Implants
    - Neurosurgical Implants
    - Orthopedic Implants
    - Spinal Implants
    - Ureteral Implants
  - Surgical Instruments
    - Surgical Blades
    - Surgical Forceps
    - Surgical Scissors
  - Syringe and Needles
    - Needles
    - Syringes
  - Tissue Engineered Medical Products
    - Cellular and Tissue-Based Products
    - Tissue Scaffolds
- Biotechnology
  - Bioengineering
  - Bioprocessing
    - Cryopreservation
    - Cultivation
      - Growth Media
  - Bioreactors
  - Biotechnology Products
    - Biological Drug Products
    - Recombinant Products
  - Industrial Biotechnology
    - Biomass and Conversion
- Business and Management
  - Banking and Finance
  - Contract Management
  - Economics
    - Cost Analysis
  - Human Resource Management
  - Marketing
  - Project Management
- Chemical Technology
  - Adhesives
    - Construction Adhesives
    - Hot-Melt Adhesives
    - Liquid Optically Clear Adhesives
    - Metal Bonding Adhesives
    - Plastic Bonding Adhesives
    - Pressure-Sensitive Adhesives
    - Solvent Cement
    - Wood Adhesives
  - Cleaning Agents
    - Bleaches
    - Ceramic Tile Cleaners
    - Metal Cleaners
    - Vapor Degreasers
  - Cosmetics
  - Dyes
    - Fluorescent Dyes
  - Industrial and Specialty Chemicals
    - Anti-Strip Additives
    - Catalysts and Catalyst Carriers
      - Catalyst Carriers
      - Fluid Catalytic Cracking Catalysts
      - Reforming Catalysts
      - Zeolite Catalysts
    - Chelating Agents
    - Deicers
    - Desiccants
    - Diluents
    - Electrolyte
    - Engine Coolants
      - Antifreezes
      - Non-Aqueous Engine Coolants
      - Recycled Coolants
      - Supplemental Coolant Additives
    - Foaming and Defoaming Agents
    - Inhibitors
      - Corrosion Inhibitors
    - Leather and Textile Chemicals
      - Softening Agents
      - Stuffing Agents
      - Tanning Agents
    - Odorants
    - Plastics Additives and Rubber Chemicals
      - Accelerants
      - Antidegradants
      - Antioxidants
      - Antiozonants
      - Antistatic Agents
      - Blowing Agents
      - Colorants
      - Fillers and Extenders
      - Flame Retardants
      - Plasticizers
      - Polymer Modifiers
      - Slip Additives
      - Stabilizers
      - Vulcanizing Agents
    - Preservatives
      - Metal Preservatives
      - Wood Preservatives
    - Quenchants
    - Solvents
    - Sorbents
    - Surfactants
      - Anionic Surfactants
      - Non-Ionic Surfactants
    - Thickeners
    - Vapor Retarders
  - Paint Application Tools
    - Extension Poles
    - Paint Brushes
    - Paint Rollers and Covers
  - Paint Related Coatings
    - Architectural Coatings
    - Automotive Coatings
    - Coil Coatings
    - Decorative Coatings
    - Factory Applied Coatings
    - Marine Coatings
    - Pipeline Coatings
    - Powder Coatings
    - Protective Coatings and Linings
      - Conversion Coatings
      - Water Repellent Coatings
    - Traffic Coatings
  - Paints
    - Artist Paints and Art Materials
    - Latex Paints
    - Lead-Based Paints
    - Solvent-Borne Paints
    - Traffic Paints
    - Waterborne Paints
  - Paints and Inks Additives
    - Binders
    - Driers
    - Ink Vehicles
    - Paint Solvents
    - Paint Vehicles
    - Pigments
      - Colored Pigments
      - Metallic Pigments
      - White Pigments
    - Thinners
  - Pine Chemicals
  - Polishes
    - Automotive Polishes
    - Floor Polishes
    - Furniture Polishes
    - Shoe Polishes
  - Printing Inks
    - Solvent-Based Inks
    - Water-Based Inks
  - Reagents
  - Soaps and Detergents
    - Detergents
    - Soaps
  - Varnishes, Lacquers, Enamels and Primers
    - Enamels
    - Lacquers
    - Primers
    - Varnishes
- Civil Engineering
  - Architecture
  - Building and Environmental Acoustics
    - Speech Privacy
  - Building Codes and Standards
    - Building Codes
    - Building Standards
  - Building Design and Construction
    - Building Enclosure Commissioning
    - Building Safety
    - Road and Pavement Design
  - Building Economics
    - Building Investments
  - Building Insulation
    - Acoustical Insulation
    - Thermal Insulation
      - Blanket Insulation
      - Loose Fill Insulation
      - Reflective Insulation
  - Building Maintenance
  - Building Performance
    - Air Leakage and Ventilation
      - Radon Mitigation Systems
    - Facility Rating Scale
  - Building Preservation and Rehabilitation
  - Building Products
    - Dimension Stone
      - Exterior Building Stone
    - Fences and Meshes
      - Chain-Link Fences
      - Expanded Metal Fences
      - Fencing Accessories
      - Ornamental Fence Systems
    - Fenestration
      - Doors and Windows
      - Skylights
    - Flooring and Floor Covering Systems
      - Floor Coverings
      - Floor Tiles
      - Resilient Flooring
      - Wood Flooring
    - Frames
    - Liners
    - Masonry Units
      - Bricks and Stones
      - Interlocking Concrete Pavers
      - Tiles
    - Reinforcement
      - Reinforcing Bars
      - Wire Reinforcement
    - Roofing and Waterproofing Membranes
    - Sheathing
    - Shingles
    - Sidings and Soffits
    - Structural Glazing
    - Surfacing
      - Microsurfacings
      - Monolithic Surfacings
  - Building Seals and Sealants
    - Aerosol Foam Sealants
    - Caulking Compounds
    - Compression Seals and Lock Strip Gaskets
    - Elastomeric Sealants
    - Glazing Compounds
    - Preformed Tape Sealants
  - Building Structures
    - Beams and Columns
    - Bridges
    - Building Decks
      - Bridge Decks
      - Roof Decks
    - Building Partitions
      - Building Envelopes
    - Ceilings
      - Suspended Ceilings
    - Lathing and Furring
    - Piles
    - Relocatable Structures
      - Tactical Shelters
    - Roofing and Waterproofing
      - Built-Up Roofs
      - Flashings
      - Foam Roofing Systems
      - Green Roofs
      - Roll Roofing
      - Steep Slope Roofing
    - Storage Tanks
      - Aboveground Storage Tanks
      - Septic Tanks
      - Underground Storage Tanks
    - Structural Panels
      - Structural Insulated Panels
    - Trusses
    - Walls and Wall Assemblies
      - Curtain Walls
      - Exterior Building Wall Systems
      - Exterior Insulation Finish Systems
  - Buildings
    - Commercial Buildings
    - Institutional Buildings
    - Residential Buildings
  - Construction Equipment
    - Concrete Mixers
    - Vibratory and Kneading Compactors
  - Flue Systems
    - Chimneys
    - Flue Gas Desulfurization Systems
  - Pavement Preservation and Rehabilitation
  - Plumbing and Sewers
    - Access Hatches
    - Culverts
      - Arch Culverts
      - Box Culverts
    - Irrigation Pipes
    - Manhole Products
    - Pipe Repair and Rehabilitation
      - Cured-In-Place Pipes
      - Trenchless Pipeline Rehabilitation
    - Pipeline Inspection and Monitoring
    - Pipes and Fittings
      - Heat Shrink Tubing
      - Pipe Arches
      - Pipe Couplings
      - Pipe Joints
      - Pipe Liners
    - Pressure Pipes
    - Sewer Pipes
      - Drain-Waste-Vent Pipes
      - Gravity Sewer Pipes
    - Storm Drains
      - Stormwater Collection Chambers
    - Underground Pipe Installation
    - Water Distribution Systems
  - Roads and Pavements
    - Chip Seals
    - Flexible Pavements
    - Reclaimed Asphalt Pavements
    - Rigid Pavements
    - Roads
      - Base Course
      - Subbase
      - Subgrade
    - Superpave
- Codes, Scales and Standards
  - Coden
  - Measurement and Conversion Tables
  - Resin Identification Code
  - Standard Scales
    - Color Scales
    - Hardness Scales
    - Temperature Scales
  - Standards and Standards Organizations
    - Reference Materials
      - Certified Reference Materials
      - Industry Reference Materials
      - Reference Radiographs
      - Standard Reference Materials
    - Standards
    - Standards Organizations
- Consumer Products
  - Baby and Toddler Products
    - Baby Cribs
      - Crib Mattresses
    - Baby Monitors
    - Bassinets and Bedside Sleepers
    - Changing Tables
    - Child Chairs
    - Child Seats
    - Cradles
    - Infant Carriers
    - Infant Walkers
    - Stationary Activity Centers
    - Strollers
    - Toddler Beds
  - Candle Products
    - Candle Containers
    - Candles
  - Cleaning Equipment, Others
    - Brooms
    - Mops
  - Consumer Behavior
    - Consumer Product Evaluation
      - Consumer Preference Test
  - Consumer Product Safety
    - Bath Tub Safety
    - Pool Safety
    - Toy Safety
  - Electronic Appliances
  - Fabric Fasteners
    - Buttons
    - Zippers
  - Flammable Liquid Containers
    - Portable Diesel Containers
    - Portable Gasoline Containers
    - Portable Kerosene Containers
  - Furniture
    - Chests
    - Outdoor Furniture
  - Home Playground Equipment
    - Play Yards
    - Swings
  - Jewelry
    - Adult Jewelry
  - Lighters
    - Utility Lighters
  - Personal Care Products
    - Wipes and Towelettes
  - Public Use Play Equipment
    - Constant Air Inflatables
    - Fun Karts
    - Recreational Powered Scooters
    - Soft Contained Play Equipment
  - Safety Accessories
    - Bed Rails
    - Emergency Escape Ladders
    - Expandable Gates and Enclosures
    - Window Fall Prevention Devices
  - Shopping Carts
  - Swimming Pools, Spas, and Tubs
    - Bath Seats and Tubs
    - Bathrooms
    - Spas
    - Swimming Pools
  - Toys
    - Non-Powder Guns
    - Riding Toys
  - Upholstery
    - Mattresses
    - Wall Coverings
  - Vacuum Cleaners
    - Canister Vacuum Cleaners
    - Central Vacuum Cleaners
    - Hand-Held Vacuum Cleaners
      - Utility Vacuum Cleaners
    - Stick Vacuum Cleaners
    - Upright Vacuum Cleaners
    - Vacuum Cleaner Accessories
- Electrical and Electronics Engineering
  - Automation
    - Robotics
      - Robots
        
        Robots
  - Electrical Conductors and Cables
    - Bus Bars
    - Compact Round Stranded Conductors
    - Compressed Round Stranded Conductors
    - Concentric-Lay-Stranded Conductors
    - Electrical Cables
    - Electrical Contacts and Connectors
    - Electrodes
      - Ion-Selective Electrodes
    - Fine-Wire Bunch-Stranded Conductors
    - Overhead Conductors
    - Rope-Lay Bunch-Stranded Conductors
    - Superconductors
    - Twisted Pair Conductors
    - Unilay-Stranded Conductors
  - Electrical Devices
    - Circuit Breakers
    - Electrical Motors
    - Generators
    - Heating Elements
    - Relays
    - Transformer and Components
  - Electrical Insulation
    - Insulating Gases
    - Insulating Liquids
    - Insulating Solids
  - Electron Tubes and Emitters
  - Electronic Devices and Components
    - Amplifiers and Oscillators
    - Capacitors
    - Resistors
    - Surface Mount Devices
  - Electronic Switches and Assemblies
    - Limit Switches
    - Membrane Switches
    - Proximity Switches
  - Integrated Circuits
    - Digital Integrated Circuits
    - Linear Integrated Circuits
  - Lasers and Incoherent Light Sources
    - Lamps
      - Xenon Arc Lamps
    - Lasers
      - Chemical Lasers
  - Magnetic Conductors
    - Magnet Wires
  - Optical Materials and Coatings
  - Optoelectronic Devices
    - Display Devices
      - Visual Display Unit
    - Fiber Optical Devices
    - Optical Components
      - Optical Filters
      - Optical Mirrors
      - Optical Reflectors
      - Polarizers
  - Particle Accelerators
  - Printed Circuit Board
  - Semiconductor Devices
    - Diodes
      - LED
    - MEMS
    - Semiconductor Wafers
    - Transistors
  - Sputtering Targets and Seals
    - Electronic Seals
    - Sputtering Targets
- Energy Engineering
  - Energy Conservation
  - Energy Consumption
  - Energy Source and Power Station
    - Green Energy and Renewable Resources
      - Geothermal Energy
      - Solar Energy
    - Non-Renewable Resources
      - Fossil Fuels
      - Nuclear Energy
      - Thermal Energy
  - Power Generating Equipment and Accessories
    - Batteries
    - Boilers and Pressure Vessels
      - Boilers and Pressure Vessel Tubes
      - Pressure-Containing Parts
      - Pressure-Retaining Parts
    - Fuel Cells
      - Proton Exchange Membrane Fuel Cells
    - Heat-Transfer Apparatus
      - Condensers
      - Cooling Towers
      - Evaporators
      - Heat Exchangers
      - Superheaters
    - Power Infrastructure
      - Power Transmission Lines
      - Transmission Towers
    - Solar Devices
      - Photovoltaic Panels and Modules
      - Photovoltaic Systems
      - Solar Cells
      - Solar Collectors
      - Solar Heating Systems
    - Turbines and Components
      - Gas Turbines
      - Rotor and Rotor Blades
      - Steam Turbines
      - Water Turbines
      - Wind Turbines
- Environmental Engineering
  - Air Quality
    - Air Filters
      - HEPA Filters
    - Air Quality Control Systems
    - Indoor Air Quality
  - Biological Effects and Environmental Fate
    - Aquatic Toxicology
      - Bioaccumulation
      - Bioconcentration
    - Biological Effects
    - Environmental Toxicology
      - Terrestrial Toxicology
  - Environmental Economics
    - Environmental Liability
  - Environmental Impact Assessment
    - Corrective Action
      - Risk-Based Corrective Action
    - Environmental Hazard Assessment
    - Environmental Risk Assessment
    - Environmental Site Assessment
      - Environmental Health Site Assessment
      - Phase I Environmental Site Assessment
      - Property Condition Assessment
      - Real Estate Assessment
      - Vapor Encroachment Screening
    - Life Cycle Assessment
      - Environmental Product Declaration
  - Environmental Management
    - Environmental Audits
    - Water Use and Conservation
  - Environmental Monitoring
    - Biomonitoring
  - Environmental Regulations and Laws
    - Environmental Act
    - Environmental Protection Agency
  - Environmental Safety and Sustainability
    - Environmental Reclamation and Conservation
  - Oil Spill Response and Control
    - Oil Spill Cleanup and Recovery
    - Oil Spill Control Systems
      - Oil Dispersants
      - Oil Spill Booms
      - Skimmers
    - Oil Spills
  - Pollution
    - Air Pollution
      - Airborne Particulate Matter
      - Vapor Intrusion
    - Land Pollution
    - Marine Pollution
    - Noise Pollution
    - Pollution Abatement and Control
      - Flue Gas Desulfurization
    - Water Pollution
  - Stormwater Management
    - Hydrodynamic Separators
    - Stormwater Treatment Devices
  - Waste Management
    - Recycling and Resource Recovery
      - Refuse-Derived Fuel
    - Remediation
      - Air Sparging
      - Bioremediation
      - Dredging
      - Greener Cleanups
    - Waste
      - E-Waste
      - Hazardous Waste
      - Industrial Waste
      - Mixed Waste
      - Municipal Solid Waste
      - Radioactive Waste
    - Waste Disposal
    - Waste Management Facilities
      - Waste Disposal Sites
    - Wastewater
      - Industrial Wastewater
  - Waste Treatment
    - Solid Waste Treatment
      - Composting
      - Incineration
      - Landfills
    - Waste Treatment Equipment and Facilities
      - Incinerators
      - Ion Exchange Resins
      - Membrane Filters
    - Wastewater Treatment
      - Aeration
      - Anaerobic Digestion
      - Sewage Treatment
  - Water Quality
    - Biochemical Oxygen Demand
    - Chemical Oxygen Demand
    - Dissolved Oxygen
  - Water Treatment
- Food Technology
  - Cleaning and Sanitation Equipment
    - Commercial Dishwashing Machines
      - Conveyor Rack Type Dishwashers
      - Dump Type Dishwashers
      - Glasswashing Machines
      - Rotary Conveyor Type Dishwashers
      - Stationary Rack Type Dishwashers
    - Food Waste Disposers
    - Food Waste Pulpers
  - Cooking and Warming Equipment
    - Broilers
      - Conveyor Broilers
      - Overfired Broilers
      - Underfired Broilers
    - Cook Tops
    - Cookers
      - Steam Cookers
    - Food Processing Equipment
    - Fryers
    - Griddles
    - Holding Tables and Cabinets
    - Kettles
      - Steam Jacketed Kettles
    - Ovens
      - Convection Ovens
      - Cook-and-Hold Ovens
      - Gas Fired Electric Ovens
      - Microwave Ovens
    - Pans
      - Braising Pans
      - Frying Pans
    - Toasters
  - Food and Beverages
    - Beverages
    - Cereals and Pulses
    - Fruits and Vegetables
    - Meat and Meat Products
    - Milk and Milk Products
  - Food Evaluation Devices
  - Food Processing
    - Food Irradiation
  - Food Safety
    - HACCP
  - Food Service Equipment
  - Food Service Gloves
  - Mechanical Preparation Equipment
    - Food Cutting Machines
    - Food Mixers
    - Food Slicers
    - Kitchen Ventilation Systems
    - Vegetable Peelers
  - Storage and Dispensing Equipment
    - Dispensers
      - Beverage Dispensers
      - Coffee Brewers
      - Ice Dispensers
      - Milk Dispensers
      - Tea Dispensers
    - Storage Equipment
      - Freezers
      - Refrigerators
      - Thaw Cabinets
- Forensic Science and Engineering
  - Criminalistics
    - Computer Forensics
      - Digital and Multimedia Evidence
    - Crime Scene Investigation
      - Evidence Collection
      - Evidence Documentation
      - Evidence Preservation
    - Document Alteration
      - Forgery
    - Fiber Examination
    - Forensic Ballistics
      - Ammunition
      - Firearms
      - Firearms and Ammunition Examination
      - Gunshot Residues
      - Gunshot Trajectory Reconstruction
    - Forensic Chemistry
      - Explosives and Explosion Analysis
      - Fire Debris and Arson Analysis
      - Paint Analysis
      - Trace Element Analysis
    - Forensic Glass Examination
    - Physical Evidence
      - Impression Evidence
      - Trace Evidence
    - Questioned Document Examination
      - Altered Document Detection
      - Handwriting Identification
      - Indented Writing Restoration
      - Ink Examination
      - Office Equipment Identification
      - Paper Examination
    - Questioned Documents
  - Death Investigation
    - Death
    - Manner of Death
    - Postmortem Interval
  - Forensic Anthropology
    - Fingerprinting
    - Forensic Podiatry
  - Forensic Biology
    - Wildlife Forensics
  - Forensic Engineering
    - Electrical Incidents and Investigation
    - Product Defect Incidents and Investigation
    - Vehicular Incidents and Investigation
  - Forensic Examiner Education and Training
  - Forensic Genetics
    - DNA Typing
      - PCR
    - Genetic Markers
  - Forensic Jurisprudence
    - Crimes
      - Criminal Sex Offenses
    - Criminal Justice System
      - Law Enforcement
    - Criminals
    - Victimology
    - Witness
      - Expert Witness
  - Forensic Odontology
    - Dental Evidences
  - Forensic Pathology
    - Diseases and Conditions
      - Allergic Diseases
      - Cancer and Tumors
      - Nervous System Diseases
      - Pathogenic Diseases
      - Vascular Diseases
    - Wounds and Injuries
      - Bone Trauma
      - Burn Injuries
      - Soft Tissue Injuries
  - Forensic Psychophysiology
    - Forensic Psychiatry
    - Forensic Psychology
      - Psychophysiological Detection of Deception
  - Forensic Serology
    - Body Fluids
      - Blood
      - Urine
    - Serological Investigation
  - Forensic Toxicology
    - Drugs
      - Amphetamines
      - Cocaine
      - Phencyclidine
    - Forensic Drug Analysis
    - Pharmacokinetics
    - Poisoning
- Geotechnical Engineering
  - Coastal and Offshore Structures
    - Continental Shelf
  - Erosion Control
    - BrushmattressÂ
    - Fascines
    - Gabions and Revet Mattresses
    - Hydraulic Erosion Control Products
    - Mulches
    - Rolled Erosion Control Products
      - Turf Reinforcement Mats
    - Tackifiers
  - Geofill Materials
    - Backfills
    - Structural Fills
  - Geoinformatics
    - Geographic Information Systems (GIS)
    - Geospatial Metadata
  - Geological Classification and Standards
    - Rock Mass Classification System
  - Geological Effects
    - Flood
    - Geomorphology
    - Landslide
    - Seismology
      - Earthquake
      - Seismic Waves
      - Tsunami
    - Tectonics
      - Geological Faults
  - Geophysical Exploration
    - Geophysical Methods
      - Electromagnetic Method
      - Gravity Method
      - Magnetic Method
      - Seismic Method
    - Stratigraphy
    - Sub-Surface Exploration
      - Auger Boring
      - Boreholes
      - Downhole Drilling
      - Drilling
      - Mining and Coring
  - Geostatistical Techniques
  - Geosynthetics
    - Geocomposites
    - Geofoams
    - Geogrids
    - Geomembranes
      - Non-Reinforced Geomembranes
      - Reinforced Geomembranes
    - Geonets
    - Geosynthetic Clay Liners
    - Geotextiles
      - Knitted Geotextiles
      - Nonwoven Geotextiles
  - Geotechnical Structures
    - Embankments
      - Berms and Levees
      - Earth Dams
    - Foundations
      - Deep Foundations
    - Retaining Walls
    - Slopes
    - Trench
    - Tunnels and Underground Structures
  - Hydrological Exploration
    - Aquifers
      - Confined Aquifers
      - Unconfined Aquifers
    - Groundwater Modeling
    - Groundwater Monitoring and Sampling
      - Groundwater Monitoring
      - Groundwater Monitoring Wells
      - Groundwater Sampling
      - Well Construction and Design
      - Well Maintenance and Rehabilitation
    - Groundwater Systems
      - Vadose Zone
      - Water Table
      - Wells
  - Hydrology and Soil Mechanics
    - Soil Compaction
    - Soil Consolidation
    - Soil Erosion
    - Soil Freezing
    - Soil Infiltration
    - Soil Liquefaction
    - Soil Suction
    - Soil Thawing
    - Surface Runoff
  - Remote Sensing
    - Aerial Photography
    - Photogrammetry
    - Remote Sensing by Radar
    - Satellite Imagery
  - Revetments
    - Man-Made Riprap
    - Natural Riprap
  - Soil and Rocks Sampling
  - Soil Stabilization
- Healthcare and Pharmaceutical Engineering
  - Emergency Medical Services
    - Emergency Equipment
    - Emergency Medical Technician
    - EMS Ambulance Operations
    - EMS Training and Education
  - Health Care Facilities
  - Healthcare Data Analysis
  - Healthcare Documentation
    - Dictation
    - Medical Transcription
    - Speech Recognition Technology
  - Healthcare Information Systems
    - Electronic Health Records
      - Continuity of Care Record
    - Healthcare Data Security Systems
    - Healthcare Document Formats
    - Laboratory Information Management Systems
  - Pharmaceutical Engineering
    - Biopharmaceutical Manufacturing
    - Pharmaceutical Manufacturing and Control
    - Pharmaceutical Manufacturing Equipment
      - Process Analytical Technology
- Imaging Technology
  - Business Copy Products
    - Copiers
      - Electrostatic Copiers
      - Full-Color Copiers
    - Imaging and Printing Consumables
      - Cartridges
      - Inks
      - Ribbons
      - Toners
    - Printers
      - Impact Printers
      - Inkjet Printers
      - Laser Printers
      - Thermal Printers
    - Scanners
    - Typewriters
      - Electric Typewriters
      - Electronic Typewriters
  - Image and Signal Processing
    - Image Denoising
      - Image Resolution and Quality
    - Image Recognition
      - Optical Character Recognition
    - Image Reconstruction
  - Imaging Devices
    - Optical Tracking Systems
    - Photographic Equipment
  - Imaging Standards
    - DICOM (Digital Imaging and Communications in Medicine)
    - DICONDE
  - Imaging Techniques
    - 3D Imaging
      - 3D Imaging Systems
    - Imaging
      - Electrostatic Imaging
      - Inkjet Imaging
      - Thermal Imaging
  - Photography
    - Photographic Films
- Industrial Special Purpose
  - Corrosive Service Applications
    - Anodic Protection
    - Cathodic Protection
  - High-Pressure Services
  - Pressure Tight Applications
    - Gaskets
    - Seals
  - Temperature Services
    - High-Temperature Services
    - Low-Temperature Services
    - Moderate-Temperature Services
- Instrumentation Engineering
  - Calibration
  - Geophysical Instruments
    - Borehole Logging Devices
    - Consolidometers
    - Groundwater Monitoring Equipment
    - Groundwater Sampling Devices
    - Penetrometers
    - Piezometers
    - Soil Sensors
  - Laboratory Apparatus
    - Laboratory Instruments and Equipment
      - Autoclaves
      - Centrifuges
      - Environmental Chambers
      - Laboratory Ovens
      - Vacuum Chambers
      - Water Baths
      - Weighing Devices
        
        Weighing Devices
        
        Weighing Devices
    - Laboratory Ware and Supplies
      - Burets
      - Crucibles
      - Filter Papers
      - Flasks
      - Funnels
      - Interchangeable Ground Joints
      - Laboratory Containers
      - Pipets
      - Test Tubes
  - Measuring Instruments
    - Accelerometers
    - Ammeters
    - Calorimeters
      - Bomb Calorimeters
      - Cone Calorimeters
      - Differential Scanning Calorimeters
    - Chemical Analyzers
    - Colorimeters
    - Counters and Detectors
      - Radiation and Particle Detectors
        
        Radiation and Particle Detectors
    - Densitometers
    - Dilatometers
    - Dosimeters
    - Durometers
    - Dynamometers
    - Extensometers
    - Falling Weight Deflectometers
    - Fluid Flow Meters
    - Fluorometers
    - Guarded Hot-Plate Apparatus
    - Heat Flow Meters
    - Hydrometers
    - Hygrometers
    - Inclinometers
    - Interferometers
    - Lysimeters
    - Micrometers
    - Nephelometers
    - Nuclear Density Gages
    - Penetrameters
    - Permeameters
      - Constant-Head Permeameters
      - Falling Head Permeameters
      - Flexible Wall Permeameters
      - Rigid Wall Permeameters
    - Ph Meters
    - Photometers
      - Flame Photometers
      - Spectrophotometers
    - Polarimeters
    - Pressure Gages
    - Probes and Sensors
      - Strain Gages
      - Thermocouples
    - Profilograph
    - Profilometers
    - Pycnometers
    - Pyranometers
    - Pyrheliometers
    - Refractometers
    - Relaxometers
    - Retroreflectometers
    - Rheometers
      - Bending Beam Rheometers
      - Dynamic Shear Rheometers
      - Torque Rheometers
    - Spectrometers
      - Atomic Spectrometers
      - Infrared Spectrometers
      - Mass Spectrometers
      - Particle Spectrometers
      - X-Ray Spectrometers
    - Tensiometers
    - Thermo Mechanical Analyzers
    - Thermometers
      - Digital Contact Thermometers
      - Directional Flame Thermometers
      - Liquid-In-Glass Thermometers
      - Radiation Thermometers
      - Resistance Thermometers
    - Time-Domain Reflectometers
    - Tribometers
    - Turbidimeters
    - Viscometers
      - Oscillating Piston Viscometers
      - Rotational Viscometers
      - U-Tube Viscometers
    - Voltmeters
    - Wattmeters
  - Process Control and Monitoring Instruments
    - Fuel Monitors
    - Process Stream Analyzers
    - Programmable Logic Controllers
  - Testing Instruments
    - Abrasion Testers
    - Compression Testing Machines
    - Corrosion Testing Apparatus
    - Dynamic Mechanical Analyzers
    - Flash Point Testers
      - Closed Cup Flash Point Testers
      - Open-Cup Flash Point Testers
    - Fracture Testing Apparatus
    - Gyratory Compactors
    - Hardness Testing Machines
      - Barcol Impressor Hardness Tester
      - Webster Hardness Tester
    - Impact Testing Machines
    - Microscopes
      - Electron Microscopes
      - Light Microscopes
    - Samplers
    - Tensile Testing Machines
    - Test Sieves
    - Torque Testing Machines
    - Universal Testing Machines
    - Wind Tunnels
- IT and Telecommunication
  - IT
    - Artificial Intelligence
      - Artificial Neural Networks
      - Expert Systems
    - Computers and Software
      - Application Software
      - Computer Algorithms and Programs
      - Computer Simulation
      - Computers
      - Software Libraries
      - System Software
    - Information Storage and Retrieval Systems
      - Data Mining
      - Database Management Systems
        
        Database Management Systems
        
        Database Management Systems
        
        Database Management Systems
      - Information Retrieval and Data Automation
      - Storage Devices
    - Networking
      - Network Protocols and Standards
      - Networks
  - Telecommunication
    - Communication Equipment and Systems
    - Data Transmission
    - GPS/GNSS
    - Radio Communication
    - Radio Frequency Identification
    - Telecommunication Cables
- Language Services and Products
  - Language Products
  - Language Services
    - Language Instruction
    - Language Interpretation
    - Language Test
      - Language Proficiency
      - Language Service Quality
    - Language Translation
  - Standardization and Terminology
    - Standardization
    - Terminology
- Logistics Management
  - Fleet Management
  - Inventory Management
  - Loading
  - Material Handling and Lifting Equipment
    - Conveyor Systems
    - Cranes
    - Overhead Lifting Equipment and Accessories
  - Material Handling Safety
  - Packaging
    - Child-Resistant Packaging
    - Food Packaging
    - Labeling and Marking
    - Pharmaceutical and Medical Packaging
  - Packaging Machinery
  - Shipment
  - Shipping and Transportation
    - Automatic Guided Vehicles
    - Energy Piping Systems
    - Intelligent Transportation Systems
  - Storage
  - Transport Packaging Materials and Accessories
    - Crates
    - Pallets
    - Primary Barrier Packaging Materials
      - Cushioning Materials
      - Porous Packaging Materials
    - Shipping Containers
      - Corrugated Containers
      - Wooden Boxes
    - Stretch Wrap Films
    - Tapes and Labels
      - Pressure-Sensitive Tapes
- Marine Engineering
  - Machinery and Piping Systems
  - Marine Safety
  - Marine Vessels
    - Barges
    - Merchant Vessels
    - Naval Ships
    - Unmanned Maritime Vehicle Systems
  - Outfitting and Deck Machinery
    - Guard Rails
    - Marine Decks
    - Marine Doors
  - Shipbuilding and Marine Structures
    - Hulls Structure Elements
    - Marine Engines and Propulsion Systems
    - Marine Ventilation, Air Conditioning and Heating Systems
    - Navigation and Control Equipment
    - Ship Building Structures
    - Shipboard and Marine Electrical Equipment
    - Shipbuilding Materials and Components
- Mathematics and Natural Sciences
  - Anatomy
    - Cells
    - Musculoskeletal Systems
    - Nervous Systems
    - Organs
  - Atmospheric Science
    - Climatology
      - Global Warming
      - Greenhouse Gases
    - Meteorology
    - Weather
  - Biology
    - Animals
      - Amphibians
      - Canids
      - Rodents
      - Ruminants
    - Aquatic Organisms
    - Bioaerosols
    - Biofilms
    - Bioterrorism
    - Birds
    - Insects
    - Microorganisms
      - Algae
      - Bacteria
      - Fungi
      - Virus
    - Physical Anthropology
      - Anthropometry
    - Plants
  - Chemistry
    - Analytical Chemistry
  - Ecology
    - Ecosystems
      - Aquatic Ecosystem
      - Terrestrial Ecosystem
    - Population Ecology
  - Geography
  - Mathematics
    - Numerical Methods
      - Finite Element Method
    - Statistical Models
  - Pathology
  - Physics
    - Condensed Matter Physics
    - Mechanics
- Mechanical Engineering
  - Equipment and Machinery
    - Actuators
    - Furnaces and Kilns
    - Machine Tools
    - Mixers and Blenders
  - Fluid Systems and Components
    - Fans, Blowers and Compressors
      - Fans
    - Fluid Storage Devices
    - Hoses
    - Hydraulic Systems
    - Pumps
      - Centrifugal Pumps
        
        Centrifugal Pumps
      - Positive Displacement Pumps
        
        Positive Displacement Pumps
  - HVAC Systems
    - Air Conditioning Systems
    - Radiant Barriers
  - Installation, Maintenance and Repair
    - Condition Monitoring
    - Lubrication
      - Boundary Lubrication
  - Mechanical Components
    - Anchors
    - Bearings
      - Ball Bearings
      - Journal Bearings
      - Roller Bearings
    - Bushings and Sleeves
    - Chains
    - Fasteners
      - Bolts, Screws and Studs
      - Clamps
      - Nails, Spikes and Staples
      - Nuts
      - Retaining Rings
      - Rivets
      - Washers
    - Flanges
    - Gears
    - Mechanical Joints
      - Bonded Joints
      - Expansion Joints
      - Mechanical Splices
      - Welded Joints
    - Nozzles
    - Ropes and Cables
    - Rotors
    - Shafts and Couplings
    - Springs
      - Box Springs
      - Disk Springs
      - Torsion Springs
      - Valve Springs
    - Valves
      - Control Valves
      - Multi-Turn Valves
      - Quarter-Turn Valves
      - Self-Actuated Valves
- Nanotechnology
  - Nanomaterials
    - Nanoparticles
- Nuclear Technology
  - Dosimetry Systems
    - Chemical Dosimetry Systems
    - Film Dosimetry Systems
    - Routine Dosimetry Systems
    - Thermoluminescent Dosimetry Systems
  - Nuclear Facility Operations
    - Nuclear Accidents
    - Nuclear Facility Decommissioning
    - Nuclear Fuel Transportation and Storage
    - Nuclear Reactor Regulation
    - Reactor Pressure Vessel Surveillance Program
  - Nuclear Reactor Components
    - Fuel Rods
    - Reactor Core
  - Nuclear Reactor Materials
    - Fuel Cladding
    - Moderators
    - Neutron Absorbers
    - Reactor Coolants
    - Reactor Shielding
  - Nuclear Reactors
    - Heavy Water Reactors
    - Light Water Reactors
    - ResearchÂ and TestÂ Reactors
  - Radiation Processing
- Petroleum Engineering
  - Oil and Gas Drilling
    - Coring
    - Drilling Rigs
      - Drilling Risers
      - Oil Platforms Design and Construction
      - Subsea ProductionÂ Systems
    - Oil and Gas Drilling, Subsea
    - Oil and Gas Drilling, Surface Off-Shore
    - Oil and Gas Drilling, Surface On-Shore
  - Oil and Gas Occupational Heath and Safety
    - Oil and Gas Pipeline Safety
    - Process Safety
  - Oil and Gas Pipelines, Shipping and Storage
    - Custody Transfer
    - Oil and Gas Pipelines
  - Petroleum Engineering, Subsea
  - Petroleum Engineering, Surface Off-Shore
  - Petroleum Engineering, Surface On-Shore
  - Refining and Marketing
    - Petroleum Marketing and Distribution
      - Distribution Terminals and Filling Stations
      - Marine Transfer Operations
    - Petroleum Refining and Natural Gas Processing
      - Petroleum Refineries
  - Well Completion and Servicing
    - Well Completion
      - Well Cementing
      - Well Completion Systems
        
        Well Completion Systems
        
        Well Completion Systems
        
        Well Completion Systems
        
        Well Completion Systems
        
        Well Completion Systems
        
        Well Completion Systems
    - Well Completion and Servicing, Subsea
    - Well Completion and Servicing, Surface
    - Well Decommissioning
    - Well Servicing
      - Well-Service Equipment
    - Well Stimulation
      - Hydraulic Fracturing
- Quality and Statistics
  - Acceptance Criteria and Testing
    - Acceptance Criteria
    - Acceptance Testing
    - Proficiency Test
    - Round Robin Test
    - Ruggedness Testing
  - Accreditation and Certification
    - Accreditation
      - Laboratory Accreditation
    - Accreditation Systems and Practices
    - Inspection and Verification
      - In-Service Inspection
    - Qualification and Certification
      - Personnel Certification
  - Data Collection and Analysis
  - Design of Experiments
  - Failure Mode and Effects Analysis
  - Measurement Systems Analysis
  - Quality Assurance
    - Quality Control
    - Quality Planning
  - Reliability
  - Sampling
    - Probability Sampling
      - Random Sampling
      - Systematic Sampling
    - Sampling Plan
  - Statistical Analysis
    - Reliability Analysis
  - Test Method Evaluation
    - Accuracy
    - Error
    - Measurement Uncertainty
    - Precision and Bias
    - Repeatability and Reproducibility
    - Sensitivity
    - Validation
  - Total Quality Management
    - Process Capability
    - Process Understanding
    - Statistical Quality Control
      - Analysis of Variance
      - Correlation Analysis
      - Error Analysis
      - Multi-Variate Analysis
      - Regression Analysis
    - Statistical Tools
      - Control Charts
- Railway Engineering
  - Railroad Materials
    - Railroad Ballasts
    - Rails and Ties
  - Railway Components
  - Railway Rolling Stock
    - Tractive Stock
      - Locomotives
    - Trailing Stock
      - Rail Cars
  - Railway Services
    - Electric Railway Services
    - Locomotive Hauled Railway Services
    - Mass Transit Services
- Safety and Security
  - Fire Safety
    - Fire Hazard Assessment
      - Fire Hazards
    - Fire Prevention
    - Fire Protection Systems and Equipment
      - Fire Extinguishers
      - Fire-Resistant Materials
      - Fireproofing
      - Firestops
    - Fire Risk Assessment
  - Homeland Security
    - Airport Security
    - Arms and Ammunition
    - CBRNE Sensors and Detectors
      - Handheld Point Chemical Vapor Detectors
      - HAZMAT Detectors
      - Metal Detectors
    - Detention and Correctional Facilities
    - Emergency Management
      - Emergency Medical Responders
      - Emergency Response
      - Incident Command System
      - Incident Management
    - Personnel Decontamination Systems
    - Security Systems and Equipment
      - Electronic Security Systems
      - Locking Devices
      - Perimeter Security and Vehicle Barriers
      - Proximity Warning and Alert Systems
      - Security Seals
      - Vaults
  - Occupational Health and Safety
    - Chemical Safety and Hazard Communication
      - Chemical Hazards
        
        Chemical Hazards
      - MSDS
      - REACH
    - Dust Explosion
    - Electrical and Arc Flash Safety
    - Ergonomics
    - Occupational Exposure
      - Workplace Atmospheres
    - Occupational Injuries and Illnesses
    - Occupational Safety Training
    - Oxygen Enriched Atmospheres
      - Confined Space Safety
      - Oxygen Systems
    - Safety Markings
  - Pedestrian and Walkway Safety
    - Pavement Markers
    - Sidewalk Safety
    - Walkway Surfaces
  - Personal Protective Equipment
    - Body Armor
    - Electrical Protective Equipment
    - Eye and Face Protective Equipment
    - Fall Protection Equipment
    - Foot Protective Equipment
    - Hand Protective Equipment
    - Personal Protective Clothing
      - Chemical Protective Clothing
      - Radiation Protection Clothing
      - Thermal Protective Clothing
    - Respiratory Protective Equipment
  - Search and Rescue
    - Rescue Animals and Training
    - Rescue Operations
      - Ice Rescue
      - Land Rescue
      - Mountain Rescue
      - Urban Search and Rescue
      - Water Rescue
    - Rescue Personnel and Training
      - Hazard Awareness
    - Rescue Systems and Equipment
  - Traffic Safety
- Sports and Recreation
  - Recreational Facilities and Equipment
    - Amusement Rides and Devices
      - Amusement Railway Rides and Devices
      - Patron-Directed Amusement Rides
      - Water-Related Amusement Rides
    - Camping Softgoods
      - Backpacks
      - Sleeping Bags
      - Tents
    - Recreational Basketball Equipment
    - Recreational Snow Sports
    - Treestands
  - Sport Biomechanics
    - Sports Injuries
  - Sports and Equipment
    - Aerial Adventure Sports and Equipment
    - Airsoft and Equipment
      - Airsoft
      - Airsoft Guns
    - Archery and Equipment
      - Archery
      - Archery Equipment
    - Athletics and Equipment
      - Athletic Footwear
      - Athletics
      - Pole Vault
    - Baseball and Equipment
      - Baseball
      - Baseball Equipment
    - Bicycles and Equipment
      - Bicycle Equipment
      - Bicycle Racing
      - Bicycles
    - Fitness Equipment
      - Elliptical Trainers
      - Inclusive Fitness Equipment
      - Treadmills
    - Football and Equipment
      - Football
      - Football Equipment
    - Gymnastics and Wrestling Equipment
      - Wrestling
    - Hockey and Equipment
    - Horse Sports and Equipment
      - Body Protectors
      - Horse Sports
    - Ice Hockey and Equipment
      - Ice Hockey
    - Lacrosse Equipment
    - Martial Arts
    - Motor Sports
    - Paintball and Equipment
      - Paintball
      - Paintball Equipment
    - Parasailing and Equipment
    - Skating
      - Ice Skating
      - Roller Skating
    - Skiing and Snowboarding Equipment
      - Ski Bindings and Retention Devices
      - Skiing
      - Skis and Boots
      - Snowboards
    - Snow Sports and Equipment
      - Alpine Skiing
      - Snowboarding
    - Soccer and Equipment
      - Soccer
      - Soccer Equipment
    - Softball and Equipment
      - Softball
      - Softball Equipment
    - Surfing and Equipment
    - Trampolines and Equipment
      - Trampoline Courts
      - Trampolines
      - Trampolines Equipment
  - Sports Facilities and Playing Surfaces
    - Playing Surfaces
      - Artificial Turf Surfaces and Systems
      - Natural Playing Surfaces
    - Sports Facilities
      - Skatepark
  - Sports Psychology
  - Sports Safety and Protective Equipment
    - Protective Equipment
      - Eye Protectors
      - Face Protectors
      - Helmets
      - Mouth Protectors
    - Sports Safety
  - Sports Training and Education
Materials
- Biochemicals
  - Alkaloids and Flavanoids
    - Alkaloids
  - Amino Acids, Peptides and Proteins
    - Amino Acids
      - Nonessential Amino Acids
    - Proteins
      - Conjugated Proteins
        
        Conjugated Proteins
        
        Conjugated Proteins
      - Simple Proteins
        
        Simple Proteins
      - Structural Proteins
        
        Structural Proteins
  - Biological Factors
    - Antibodies
    - Biological Pigments
    - Biological Toxins
    - Immunogens and Antigens
  - Biopolymers
    - Chitin
    - Lignin
    - Plant Gums
    - Tannin
  - Carbohydrates
    - Monosaccharides
      - Arabinose
      - Galactose
      - Xylose
    - Polysaccharides
      - Cellulose
      - Cellulose Derivatives
        
        Cellulose Derivatives
        
        Cellulose Derivatives
      - Starch
  - Enzymes and Coenzymes
    - Coenzymes
    - Enzymes
      - Hydrolases
      - Transferases
  - Lipids
    - Fats and Oils
      - Animal Fats and Oils
      - Marine Fats and Oils
      - Sulfonated and Sulfated Oils
      - Vegetable Fats and Oils
    - Fatty Acids
      - Saturated
    - Glycerides
      - Diglycerides
      - Monoglycerides
      - Triglycerides
  - Nucleic Acids, Nucleotides and Nucleosides
    - Nucleic Acids
      - DNA
    - Nucleosides
  - Terpenes
  - Vitamins
    - Fat Soluble Vitamins
      - Vitamin E
- Cementitious Materials
  - Admixtures
    - Chemical Admixtures
      - Accelerating Admixtures
      - Air-Entraining Admixtures
      - Cold-Weather Admixtures
      - Coloring Admixtures
      - Set-Retarding Admixtures
      - Water-Reducing Admixtures
    - Mineral Admixtures
      - Pozzolans
        
        Pozzolans
        
        Pozzolans
        
        Pozzolans
        
        Pozzolans
  - Aggregates
    - Coarse Aggregates
    - Fine Aggregates
    - Recycled Concrete Aggregates
  - Asphalt Mixtures
    - Asphalt Cement
      - Cutback Asphalt
      - Emulsified Asphalt
    - Asphalt Concrete
    - Hot Mix Asphalt
    - Warm Mix Asphalt
  - Cement
    - Blended Hydraulic Cement
    - Hydraulic Cement
      - Masonry Cement
      - Natural Cement
      - Portland Cement
    - Special Hydraulic Cement
      - Expansive Cement
      - Oil Well Cements
      - Plastic Cement
      - Rapid Hardening Cement
        
        Rapid Hardening Cement
  - Concrete
    - High and Ultra-High-Performance Concrete
      - High-Density Concrete
      - Roller-Compacted Concrete
      - Self-Consolidating Concrete
    - Light-Weight Concrete
      - Cellular Light-Weight Concrete
      - Light-Weight Insulating Concrete
    - Pervious Concrete
    - Polymer Concrete
    - Polymer-Modified Concrete
      - Polymer Cement Concrete
    - Preplaced-Aggregate Concrete
    - Ready-Mix Concrete
    - Reinforced Concrete
      - Fiber-Reinforced Concrete
        
        Fiber-Reinforced Concrete
    - Returned Fresh Concrete
    - Shotcrete
      - Dry-Mix Shotcrete
      - Wet-Mix Shotcrete
  - Concrete Products
    - Concrete Pipes
      - Concrete Drain Tiles
      - Non-Reinforced Concrete Pipes
      - Perforated Concrete Pipes
      - Reinforced Concrete Pipes
    - Precast Concrete Products
      - Architectural Products
        
        Architectural Products
      - Structural Products
        
        Structural Products
        
        Structural Products
        
        Structural Products
        
        Structural Products
        
        Structural Products
        
        Structural Products
    - Prestressed Concrete Products
  - Controlled Low-Strength Materials
  - Fiber-Reinforced Cement Products
    - Asbestos-Cement Products and Accessories
      - Asbestos Sheets
        
        Asbestos Sheets
      - Asbestos-Cement Pipes
    - Non-Asbestos Fiber-Reinforced Cement Products
  - Gypsum Products
    - Calcined Gypsum
    - Glass-Reinforced Gypsum
    - Gypsum Panel Products
      - Gypsum Boards
        
        Gypsum Boards
        
        Gypsum Boards
        
        Gypsum Boards
        
        Gypsum Boards
        
        Gypsum Boards
        
        Gypsum Boards
      - Reinforced Gypsum Panels
        
        Reinforced Gypsum Panels
        
        Reinforced Gypsum Panels
  - Lime
    - Hydrated Lime
    - Hydraulic Lime
    - Lime Putty
    - Quicklime
  - Mortars and Grouts
    - Chemical-Resistant Mortars and Grouts
      - Resin Grouts
      - Resin Mortars
      - Tile Grouts
    - Grouts
    - Mortars
  - Plasters
    - Gypsum Plasters
      - Gypsum Casting Plasters
      - Gypsum Molding Plasters
      - Keene's Cement
      - Veneer Plasters
    - Portland Cement Plasters
      - Stucco
- Chemicals -- Inorganic
  - Chemical Compounds
    - Aluminates
    - Arsenides, Selenides and Tellurides
      - Gallium Arsenide
    - Borates and Borides
      - Lithium Metaborate
    - Carbonates, Bicarbonates and Carbides
      - Boron Carbide
      - Calcium Carbide
      - Calcium Carbonate
      - Silicon Carbide
      - Sodium Bicarbonate
      - Sodium Carbonate
      - Tungsten Carbide
    - Chromates and Dichromates
      - Lead Chromate
      - Lead Silicochromate
      - Potassium Dichromate
      - Strontium Chromate
      - Zinc Chromate
    - Coordination Compounds
    - Cyanides, Cyanates and Thiocyanates
      - Hydrogen Cyanide
    - Halides
      - Chlorides
        
        Chlorides
        
        Chlorides
        
        Chlorides
        
        Chlorides
        
        Chlorides
      - Fluorides
        
        Fluorides
        
        Fluorides
        
        Fluorides
    - Hydrides
      - Ammonia
      - Calcium Hydride
      - Silicon Hydride
      - Sodium Borohydride
    - Hypochlorites
      - Calcium Hypochlorite
      - Sodium Hypochlorite
    - Mineral Acids
      - Binary Acids
        
        Binary Acids
        
        Binary Acids
      - Ternary Acids
        
        Ternary Acids
        
        Ternary Acids
        
        Ternary Acids
        
        Ternary Acids
        
        Ternary Acids
    - Nitrates, Nitrides and Nitrites
      - Mercury Nitrate
      - Silicon Nitride
    - Oxalates
      - Calcium Oxalate
    - Oxides and Hydroxides
      - Hydroxides
        
        Hydroxides
        
        Hydroxides
        
        Hydroxides
        
        Hydroxides
      - Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
        
        Metal Oxides
      - Nitrogen Oxides
        
        Nitrogen Oxides
      - Oxocarbon
        
        Oxocarbon
        
        Oxocarbon
      - Silica
      - Sulfur Oxides
        
        Sulfur Oxides
    - Permanganates
      - Potassium Permanganate
    - Peroxides
      - Hydrogen Peroxide
    - Phosphates, Pyrophosphates, Phosphides and Phosphites
      - Calcium Phosphate
        
        Calcium Phosphate
      - Sodium Pyrophosphate
      - Zinc Hydroxy Phosphite
      - Zinc Phosphate
    - Silicides, Silicates and Silanes
      - Aluminum Silicate
      - Calcium Borosilicate
      - Calcium Silicate
      - Magnesium Silicate
      - Molybdenum Silicide
      - Tantalum Silicide
      - Titanium Silicide
      - Tungsten Silicide
    - Sulfates, Thiosulfates, Sulfites and Sulfides
      - Ammonium Sulfate
      - Barium Sulfate
      - Cadmium Sulfide
      - Calcium Sulfate
      - Copper Sulfate
      - Hydrogen Sulfide
      - Magnesium Sulfate
      - Sodium Sulfate
  - Chemical Elements
    - Alkali Metals
      - Lithium
      - Sodium
    - Alkaline Earth Metals
      - Beryllium
      - Calcium
    - Halogens
      - Bromine
      - Chlorine
      - Iodine
    - Metalloids
      - Arsenic
      - Boron
      - Germanium
      - Silicon
    - Noble Gases
      - Argon
      - Helium
        
        Helium
      - Krypton
      - Radon
      - Xenon
    - Non-Metals
      - Carbon
      - Hydrogen
      - Nitrogen
      - Oxygen
        
        Oxygen
        
        Oxygen
      - Phosphorus
      - Sulfur
    - Rare Earth Elements
      - Actinides
        
        Actinides
        
        Actinides
      - Lanthanides
  - Isotopes
    - Non-Radioactive Isotopes
      - Boron-10
    - Radioactive Isotopes
      - Barium-140
      - Californium-252
      - Cesium-137
      - Cobalt-60
      - Iridium-192
      - Iron-55
      - Iron-59
      - Lead-210
      - Neodymium-148
      - Neptunium-237
      - Neptunium-239
      - Radiocarbon
        
        Radiocarbon
      - Radioiodine
        
        Radioiodine
      - Radiostrontium
      - Radium-226
      - Silver-110
      - Strontium-89
      - Strontium-90
      - Sulfur-32
      - Technetium-99
      - Tritium
- Chemicals -- Organic -- Aromatic
  - Monocyclic Aromatic Hydrocarbons
    - Alkenyl Substituted
      - alpha-Methylstyrene
      - Styrene
    - Alkyl Substituted
      - Cumene
      - Ethylbenzene
      - Toluene
      - Xylene
        
        Xylene
        
        Xylene
        
        Xylene
    - Benzene
  - Polycyclic Aromatic Hydrocarbons
    - Small Polycyclic Aromatic Hydrocarbons
      - Naphthalene
- Chemicals -- Organic -- Halogenated
  - Brominated Hydrocarbons
    - Bromocarbons
      - 1,2-Dibromoethane
      - n-Propyl Bromide
  - CFCs, HCFCs and Halons
    - Chlorofluorocarbons
      - 1,1,2-Trichloro-1,2,2-Trifluoroethane
      - Chlorotrifluoroethylene
      - Trichlorotrifluoroethane
    - Halons
      - 1,2-Dibromo-3-Chloropropane
      - 2-Bromo-3,3,3-Trifluoro-1-Propene
      - Bromochlorodifluoromethane
      - Bromotrifluoromethane
  - Chlorinated Hydrocarbons
    - Alkyl Chlorides
      - 1,1,1-Trichloroethane
      - Carbon Tetrachloride
      - Chlordane
      - Chloroform
      - Ethylene Dichloride
      - Heptachlor
      - Methylene Chloride
      - Perchloroethylene
      - Trichloroethylene
    - Aryl Chlorides
      - Chlorobenzene
    - Polychlorinated Biphenyls
  - Fluorinated Hydrocarbons
    - Fluorocarbons
      - Tetrafluoromethane
    - Hydrofluorocarbons
      - 1,1,1,2-Tetrafluoroethane
      - 1,1,1,2,3,3,3-Heptafluoropropane
      - 1,1,1,3,3,3-Hexafluoropropane
      - Pentafluoroethane
      - Trifluoromethane
  - Halocarbon Blends
    - HCFC Blend B
    - HFC Blend B
- Chemicals -- Organic -- Other
  - Alcohols and Phenols
    - Alcohols
      - Aliphatic and Alicyclic, Polyols
        
        Aliphatic and Alicyclic, Polyols
        
        Aliphatic and Alicyclic, Polyols
        
        Aliphatic and Alicyclic, Polyols
        
        Aliphatic and Alicyclic, Polyols
        
        Aliphatic and Alicyclic, Polyols
        
        Aliphatic and Alicyclic, Polyols
        
        Aliphatic and Alicyclic, Polyols
        
        Aliphatic and Alicyclic, Polyols
      - Aromatic Alcohols
      - Primary Alcohols
        
        Primary Alcohols
        
        Primary Alcohols
        
        Primary Alcohols
        
        Primary Alcohols
        
        Primary Alcohols
        
        Primary Alcohols
      - Secondary Alcohols
        
        Secondary Alcohols
        
        Secondary Alcohols
        
        Secondary Alcohols
      - Tertiary Alcohols
    - Phenols
      - Monohydric Phenols
        
        Monohydric Phenols
        
        Monohydric Phenols
      - Polyhydric Phenols
        
        Polyhydric Phenols
        
        Polyhydric Phenols
        
        Polyhydric Phenols
        
        Polyhydric Phenols
  - Aldehydes, Ketones and Derivatives
    - Aldehydes
      - Aliphatic and Alicyclic, Aldehydes
        
        Aliphatic and Alicyclic, Aldehydes
        
        Aliphatic and Alicyclic, Aldehydes
      - Aromatic Aldehydes
        
        Aromatic Aldehydes
    - Hydrazines
    - Ketals and Acetals
      - Acetals
    - Ketones
      - Aliphatic and Alicyclic, Ketones
        
        Aliphatic and Alicyclic, Ketones
        
        Aliphatic and Alicyclic, Ketones
        
        Aliphatic and Alicyclic, Ketones
        
        Aliphatic and Alicyclic, Ketones
        
        Aliphatic and Alicyclic, Ketones
        
        Aliphatic and Alicyclic, Ketones
        
        Aliphatic and Alicyclic, Ketones
        
        Aliphatic and Alicyclic, Ketones
        
        Aliphatic and Alicyclic, Ketones
      - Aromatic Ketones
  - Aliphatic Hydrocarbons
    - Alkanes
      - Cycloalkanes
        
        Cycloalkanes
      - Open-Chain Alkanes
        
        Open-Chain Alkanes
        
        Open-Chain Alkanes
        
        Open-Chain Alkanes
        
        Open-Chain Alkanes
        
        Open-Chain Alkanes
        
        Open-Chain Alkanes
        
        Open-Chain Alkanes
        
        Open-Chain Alkanes
    - Alkenes
      - Cycloalkenes
      - Open-Chain Alkenes
        
        Open-Chain Alkenes
        
        Open-Chain Alkenes
        
        Open-Chain Alkenes
        
        Open-Chain Alkenes
    - Alkynes
      - Acetylene
  - Carboxylic Acid and Derivatives
    - Acid Anhydrides
      - Acetic Anhydride
      - Maleic Anhydride
      - Phthalic Anhydride
    - Amides
      - Aliphatic and Alicyclic, Amides
        
        Aliphatic and Alicyclic, Amides
        
        Aliphatic and Alicyclic, Amides
    - Carboxylic Acids
      - Aromatic Carboxylic Acids
        
        Aromatic Carboxylic Acids
      - Monocarboxylic Acids
        
        Monocarboxylic Acids
        
        Monocarboxylic Acids
      - Polycarboxylic Acids
        
        Polycarboxylic Acids
    - Esters
      - Acetates
        
        Acetates
        
        Acetates
        
        Acetates
        
        Acetates
        
        Acetates
        
        Acetates
        
        Acetates
        
        Acetates
        
        Acetates
        
        Acetates
      - Acrylates and Methacrylates
        
        Acrylates and Methacrylates
        
        Acrylates and Methacrylates
        
        Acrylates and Methacrylates
        
        Acrylates and Methacrylates
        
        Acrylates and Methacrylates
      - Aliphatic Esters, Others
      - Benzoates
        
        Benzoates
      - Phthalates
        
        Phthalates
        
        Phthalates
        
        Phthalates
  - Ethers and Peroxides
    - Ethers
      - Aliphatic and Alicyclic, Ethers
        
        Aliphatic and Alicyclic, Ethers
        
        Aliphatic and Alicyclic, Ethers
        
        Aliphatic and Alicyclic, Ethers
      - Glycol Ethers
        
        Glycol Ethers
        
        Glycol Ethers
        
        Glycol Ethers
        
        Glycol Ethers
        
        Glycol Ethers
    - Peroxides
      - Di-Tert-Butyl Peroxide
      - Dicumyl Peroxide
  - Heterocyclic Compounds
    - Furans
    - Imidazoles, Thiazoles and Oxazoles
    - Indoles
    - Pyridines
    - Quinolines and Isoquinolines
  - Organic Nitrogen Compounds
    - Amines
      - Aromatic Polyamines
        
        Aromatic Polyamines
      - Aromatic, Primary
        
        Aromatic, Primary
      - Quaternary Ammonium Compounds
    - Carbamates
      - Carbofuran
    - Carbamides and Guanidines
      - Guanidines
        
        Guanidines
    - Isocyanates
      - Aromatic Isocyanates
        
        Aromatic Isocyanates
        
        Aromatic Isocyanates
        
        Aromatic Isocyanates
    - Nitriles
      - Aliphatic and Alicyclic, Nitriles
        
        Aliphatic and Alicyclic, Nitriles
    - Nitro Compounds
      - Aromatic Nitro Compounds
        
        Aromatic Nitro Compounds
  - Organochlorine Compounds
  - Organometallic Compounds
    - Tributyltin
  - Organophosphorus Compounds
    - Tricresyl Phosphate
  - Organosilicon Compounds
  - Organosulfur Compounds
    - Sulfides and Disulfides
    - Sulfonamides
    - Sulfonates, Sulfates and Sulfites
    - Sulfonic Acids
    - Thiols
    - Thiones
- Coal, Petroleum and Natural Gas
  - Alternative Fuels
    - Biofuels
      - Biodiesel and Biodiesel Blends
      - Synthetic Paraffinic Kerosene
    - Fuel Oxygenates
      - Fuel Butanol
      - Fuel Ethanol
      - Fuel Methanol
    - Synthetic Fuels
      - Shale Oils
  - Coal and Coke
    - Coal
      - Anthracite
      - Bituminous
      - Lignite
      - Subbituminous
    - Coal Gas
    - Coal Tar
    - Coke
  - Non-Petroleum Based Lubricants and Fluids
    - High-Performance Fluids and Solids
    - Metal Working Fluids
      - Metal Forming Fluids
      - Metal Removal Fluids
    - Non-Lubricating Process Fluids
      - Drilling and Well Completion Fluids
      - Heat Transfer Fluids
      - Hydraulic Fracturing Fluids
        
        Hydraulic Fracturing Fluids
      - Quench Oils
    - Way Lubricants
  - Petroleum and Natural Gas
    - Crude Oil
    - Natural Gas
    - Natural Gasoline
  - Petroleum Products
    - Asphalt, Pitch, Tar and Bitumen
    - Carbon and Graphite Products
      - Activated Carbon
        
        Activated Carbon
        
        Activated Carbon
        
        Activated Carbon
        
        Activated Carbon
      - Carbon Black
      - Graphite
      - Manufactured Carbon
    - Fuel and Lubricant Additives
    - Gaseous Fuels
      - Hydrogen Fuels
      - Liquefied Natural Gas
      - Liquefied Petroleum Gas
    - Liquid Fuels
      - Aviation Fuels
        
        Aviation Fuels
        
        Aviation Fuels
      - Burner Fuels
      - Heating and Lighting Fuel Oils
        
        Heating and Lighting Fuel Oils
        
        Heating and Lighting Fuel Oils
      - Marine Fuels
      - Motor Fuels
        
        Motor Fuels
        
        Motor Fuels
        
        Motor Fuels
      - Non-Aviation Gas Turbine Fuels
    - Lubricating Greases
    - Lubricating Oils
      - Automatic Transmission Fluids
      - Automotive Engine Oils
      - Gear Oils
      - Hydraulic Fluids
        
        Hydraulic Fluids
      - Industrial and Railway Engine Oils
      - Turbine Oils
        
        Turbine Oils
        
        Turbine Oils
    - Mineral Oils
      - Pharmaceutical White Oils
      - White Mineral Oils
    - Naphtha and Naphtha Derivatives
    - Petrochemicals
    - Petroleum Coke
      - Calcined Petroleum Coke
      - Green Petroleum Coke
      - Raw Petroleum Coke
    - Petroleum Oils for Rubber
      - Rubber Extender Oils
      - Rubber Processing Oils
    - Petroleum Waxes and Petrolatums
      - Microcrystalline Wax
      - Paraffin Wax
      - Petrolatum
    - Recycled Products
      - Used Oils
    - Residual Fuel Oils
- Composites
  - Carbon Matrix Composites
    - Fiber-Reinforced Carbon
      - Carbon Fiber-Reinforced Carbon
  - Ceramic Matrix Composites
    - Fiber-Reinforced Silicon Carbide
      - Ceramic Fiber-Reinforced Silicon Carbide
        
        Ceramic Fiber-Reinforced Silicon Carbide
  - Composite Products
    - Pipes and Tubes
    - Plates
    - Rods and Bars
    - Shells
    - Tapes
  - Fabric-Reinforced Composites
    - Braided Composites
  - Fiber-Reinforced Composites
    - Ceramic Fiber-Reinforced Composites
      - Glass Fiber-Reinforced Composites
  - Metallic Matrix Composites
    - Cemented Carbides
    - Fiber-Reinforced Aluminum
      - Ceramic Fiber-Reinforced Aluminum
        
        Ceramic Fiber-Reinforced Aluminum
  - Polymer Matrix Composites
    - Reinforced Plastics
      - Carbon Fiber-Reinforced Plastics
        
        Carbon Fiber-Reinforced Plastics
      - Glass Fiber-Reinforced Plastics
        
        Glass Fiber-Reinforced Plastics
        
        Glass Fiber-Reinforced Plastics
        
        Glass Fiber-Reinforced Plastics
      - Metal Fiber-Reinforced Plastics
      - Polymer Fiber-Reinforced Plastics
        
        Polymer Fiber-Reinforced Plastics
  - Pultruded Composites
  - Structural Composites
    - Composite Laminates
      - Cross-Ply Laminates
    - Sandwich Structures
      - Sandwich Beams
      - Sandwich Panels
        
        Sandwich Panels
        
        Sandwich Panels
- Fabrics and Leather
  - Clothing
    - Apparel
      - Denim Wear
      - Kid's Apparel
      - Men's Apparel
      - Sportswear
      - Women's Apparel
    - Co-Ordinates
      - Blankets
      - Handkerchiefs
      - Scarfs
      - Ties
    - Home Furnishings
      - Curtains and Draperies
      - Pile Floor Coverings
      - Slip Covers
    - Safety and Protective Clothing
      - Inflatable Restraints
      - Rain Wear
  - Fabrics
    - Coated Fabrics
      - Plastic-Coated Fabrics
      - Rubber-Coated Fabrics
    - Knitted Fabrics
    - Nonwoven Fabrics
    - Tire Cord Fabrics
    - Woven Fabrics
  - Fibers and Yarns
    - Man-Made Fibers
      - Carbon Fibers
      - Ceramic Fibers
      - Glass Fibers
      - Polymer Fibers
        
        Polymer Fibers
        
        Polymer Fibers
        
        Polymer Fibers
        
        Polymer Fibers
      - Regenerated Cellulose Fibers
        
        Regenerated Cellulose Fibers
      - Steel Fibers
    - Natural Fibers
      - Animal Fibers
        
        Animal Fibers
        
        Animal Fibers
        
        Animal Fibers
      - Mineral Fibers
        
        Mineral Fibers
      - Vegetable Fibers
        
        Vegetable Fibers
        
        Vegetable Fibers
    - Yarns
      - Filament Yarns
      - Spun Yarns
  - Leather
    - Raw Skins and Hides
    - Tanned Leather
      - Vegetable Tanned Leather
      - Wet Blue
      - Wet White
  - Leather Products
    - Footwear
    - Leather Gloves
- Fissile Materials
  - Fertile Materials
    - Americium Isotopes
      - Americium-241
    - Mixed Oxide Fuel
      - Gadolinium-Uranium Oxide
      - Uranium-Plutonium Dioxide
    - Plutonium Compounds and Isotopes
      - Plutonium Chloride
      - Plutonium Nitrate
      - Plutonium Oxide
        
        Plutonium Oxide
      - Plutonium-238
      - Plutonium-240
      - Plutonium-242
    - Thorium Isotopes
      - Thorium-230
      - Thorium-232
    - Uranium Compounds and Isotopes
      - Uranium Hexafluoride
      - Uranium Oxide
        
        Uranium Oxide
        
        Uranium Oxide
        
        Uranium Oxide
      - Uranium-232
      - Uranium-234
      - Uranium-236
      - Uranium-238
      - Uranyl Nitrate
  - Nuclear Spent Fuel
  - Special Nuclear Materials
    - Plutonium Fuel
      - Plutonium-239
      - Plutonium-241
    - Uranium Fuel
      - Uranium-233
      - Uranium-235
- Glass and Ceramics
  - Advanced Ceramics
    - Bioceramics
  - Clay Products
    - Structural Clay Products
      - Ceramic Tiles
      - Clay Drain Tiles
      - Clay Flue Liners
      - Vitrified Clay Filter Blocks
      - Vitrified Clay Pipes
    - Whitewares
      - Tablewares
  - Glass
    - Oxide Glass
      - Borosilicate Glass
      - Lead Glass
      - Soda-Lime Glass
  - Glass Products
    - Flat Glass
      - Annealed Glass
      - Architectural Glass
      - Chemically Strengthened Glass
      - Heat-Strengthened Glass
      - Laminated Glass
      - Tempered Glass
    - Glass Beads
    - Glass Containers
    - Glass Panels
    - Glass Pipes and Tubes
    - Glass Tablewares
    - Insulating Glass
    - Laboratory Glasswares
    - Sealing Glass
  - Glass-Ceramics
    - Bioactive Glass-Ceramics
  - Recycled Glass
    - Glass Cullet
  - Refractories
    - Acidic Refractories
      - Alumina Refractories
      - Fireclay Refractories
        
        Fireclay Refractories
        
        Fireclay Refractories
      - Silica Refractories
    - Basic Refractories
      - Chrome Refractories
      - Chrome-Magnesia Refractories
      - Dolomite Refractories
      - Magnesia-Carbon Refractories
      - Magnesia-Chrome Refractories
      - Magnesite Refractories
    - Neutral Refractories
      - Alumina-Zirconia-Silica Refractories
      - Carbon Refractories
      - Mullite Refractories
      - Zircon Refractories
  - Refractory Products
    - Monolithic Refractories
      - Castable Refractories
      - Plastic Refractories
      - Ramming Mixes
      - Refractory Mortars
    - Refractory Bricks and Shapes
      - Refractory Bricks
      - Refractory Shapes
- Metals -- Aluminum and Alloys
  - Aluminum
  - Aluminum Alloy Products
    - Castings
    - Crude/Semi-Finished Products
      - Billets, Cakes and Blooms
      - Ingots
      - Metal Powders
      - Slabs
    - Flat Products
      - Plates
      - Sheet, Strips and Foils
    - Forgings
    - Long Products
      - Bars and Rods
      - Wires
    - Metallic-Coated Products
      - Anodized
    - Profiles
      - Angles
      - Beams
      - Channels
      - Tees/Zees
    - Tubular Products
      - Corrugated Pipes and Tubes
      - Seamless Pipes and Tubes
      - Welded Pipes and Tubes
  - Aluminum Alloys
    - Heat Treatable Alloys
      - Aluminum-Copper Alloys
      - Aluminum-Copper-Silicon Alloys
      - Aluminum-Magnesium-Silicon Alloys
      - Aluminum-Zinc Alloys
    - Non-Heat Treatable Alloys
      - Aluminum-Magnesium Alloys
      - Aluminum-Manganese Alloys
      - Aluminum-Silicon Alloys
      - Aluminum-Tin Alloys
- Metals -- Copper and Alloys
  - Copper
    - Blister Copper
    - Refined Copper
      - Deoxidized Copper
      - Oxygen Free Copper
      - Tough Pitch Copper
  - Copper Alloys
    - Brass
      - Admiralty Brass
      - Aluminum Brass
      - Bismuth Brass
      - Cartridge Brass
      - Commercial Bronze
      - Free-Cutting Brass
      - Gilding Metal
      - Jewelry Bronze
      - Leaded Brass
      - Muntz Metal
      - Naval Brass
      - Nickel Silver
      - Red Brass
      - Silicon Brass
      - Tin Brass
      - Yellow Brass
    - Bronze
      - Aluminum Bronze
      - Architectural Bronze
      - Bearing Bronze
      - Gear Bronze
      - Leaded Bronze
      - Manganese Bronze
      - Phosphor Bronze
      - Silicon Bronze
      - Spinodal Bronze
      - Tin Bronze
      - Tungum Alloys
    - Copper-Nickel Alloys
    - Copper-Silicon Alloys
    - High-Copper Alloys
      - Beryllium Copper
      - Chromium Copper
      - Copper-Iron Alloys
      - Copper-Tellurium Alloys
      - Zirconium Copper
  - Copper Products
    - Castings
    - Coated Products
      - Metallic-Coated/Clad Products
      - Pre-Patinated Products
    - Crude/Semi-Finished Products
      - Billets, Cakes and Blooms
      - Cathodes
      - Ingots
      - Metal Powders
      - Slabs
    - Flat Products
      - Plates and Disks
      - Sheet, Strips and Coils
    - Forgings
    - Long Products
      - Bars and Rods
      - Wires
    - Tubular Products
      - Seamless Tubes and Pipes
      - Welded Tubes and Pipes
  - Master Alloys and Alloying Additives
    - Ferro Copper
- Metals -- Iron and Alloys
  - Cast Iron
    - Alloy Cast Iron
    - Ductile Cast Iron
    - Gray Cast Iron
    - Malleable Cast Iron
    - White Cast Iron
  - Ferroalloys and Alloying Additives
    - Alloying Additives
    - Ferroalloys
  - Iron and Steel Products
    - Castings
    - Crude/Semi-Finished Products
      - Billets and Blooms
      - Ingots
      - Metal Powders
      - Pig Iron
      - Slabs
      - Wrought Iron
    - Flat Products
      - Plates
      - Sheet, Strips and Coils
    - Forgings
    - Long Products
      - Bars, Rods and Rebars
      - Rails
      - Wires, Wire Strands and Wire Ropes
    - Metallic-Coated/Clad Products
      - Alloy Coated
      - Aluminum Coated
      - Copper Coated
      - Nickel Coated
      - Terne Coated
      - Zinc Coated
    - Non-Metallic Coated Products
      - Asphalt Coated
      - Ceramic/Enamel Coated
      - Polymer Coated
    - Tin Mill Products
      - Black Plates
      - Electrolytic Chromium Coated
      - Electrolytic Tin Coated
    - Tubular Products
      - Centrifugally Cast Pipes and Tubes
      - Corrugated Pipes and Tubes
      - Seamless Pipes and Tubes
      - Welded Pipes and Tubes
  - Steel
    - Alloy Steel
      - Chromium Steel
      - Chromium-Vanadium Steel
      - Manganese Steel
      - Molybdenum Steel
        
        Molybdenum Steel
        
        Molybdenum Steel
      - Nickel Steel
      - Nickel-Chromium Steel
      - Silicon-Manganese Steel
    - Carbon Steel
      - High-Carbon Steel
      - Low-Carbon and Mild Steel
      - Medium-Carbon Steel
    - Specialty Steel
      - Advanced High Strength Steel
        
        Advanced High Strength Steel
        
        Advanced High Strength Steel
      - Bearing Steel
      - Drawing Steel
      - Electrical Steel
      - High-Strength Low-Alloy Steel
        
        High-Strength Low-Alloy Steel
        
        High-Strength Low-Alloy Steel
      - Magnetic Materials
      - Maraging Steel
      - Spring Steel
      - Structural Steel
      - Tool Steel
        
        Tool Steel
      - Trip Steel
    - Stainless Steel
      - Austenitic Stainless Steel
      - Duplex and Super Duplex Stainless Steel
      - Ferritic Stainless Steel
      - Martensitic Stainless Steel
      - Precipitation Hardening Stainless Steel
- Metals -- Non-Ferrous Metals and Alloys
  - Bearing Alloys
    - Lead-Based Bearing Alloys
    - Tin-Based Bearing Alloys
  - Chromium and Alloys
    - Chromium
    - Chromium Alloys
  - Electrical Contact Alloys
    - Gold-Based Electrical Contact Alloys
    - Silver-Based Electrical Contact Alloys
  - Low Melting Metals and Alloys
    - Antimony and Alloys
      - Antimony
      - Antimony Alloys
    - Bismuth and Alloys
      - Bismuth Alloys
        
        Bismuth Alloys
        
        Bismuth Alloys
    - Cadmium and Alloys
      - Cadmium
      - Cadmium Alloys
        
        Cadmium Alloys
        
        Cadmium Alloys
    - Indium and Alloys
      - Indium
      - Indium Alloys
        
        Indium Alloys
        
        Indium Alloys
    - Lead and Alloys
      - Lead
      - Lead Alloys
        
        Lead Alloys
        
        Lead Alloys
    - Tin and Alloys
      - Tin
      - Tin Alloys
        
        Tin Alloys
        
        Tin Alloys
        
        Tin Alloys
        
        Tin Alloys
        
        Tin Alloys
        
        Tin Alloys
  - Magnesium and Alloys
    - Magnesium
    - Magnesium Alloys
      - Magnesium-Aluminum Alloys
      - Magnesium-Rare Earth Alloys
      - Magnesium-Zinc Alloys
  - Manganese and Alloys
    - Manganese
    - Manganese Alloys
  - Master Alloys
    - Aluminum-Based Master Alloys
    - Zinc-Based Master Alloys
  - Mercury
  - Nickel, Cobalt and Superalloys
    - Cobalt and Alloys
      - Cobalt
      - Cobalt Alloys
        
        Cobalt Alloys
    - Nickel
    - Nickel Alloys
      - Nickel-Aluminum Alloys
      - Nickel-Chromium Alloys
        
        Nickel-Chromium Alloys
        
        Nickel-Chromium Alloys
      - Nickel-Cobalt Alloys
        
        Nickel-Cobalt Alloys
      - Nickel-Copper Alloys
      - Nickel-Iron-Chromium Alloys
      - Nickel-Molybdenum Alloys
      - Nickel-Titanium Alloys
    - Superalloys
      - Cobalt-Based Superalloys
      - Iron-Based Superalloys
      - Nickel-Based Superalloys
  - Non-Ferrous Products
    - Castings
    - Coated Products
    - Crude/Semi-Finished Products
      - Anodes and Cathodes
      - Billets
      - Ingots
      - Metal Powders
      - Pellets, Briquettes and Blocks
      - Pig Metal and Sponge
    - Flat Products
      - Foils
      - Plates and Disks
      - Sheet, Strips and Coils
    - Forgings
    - Long Products
      - Bars and Rods
      - Wires
    - Profiles
    - Tubular Products
      - Seamless Pipes and Tubes
      - Welded Pipes and Tubes
  - Precious Metals and Alloys
    - Gold and Alloys
      - Gold
      - Gold Alloys
        
        Gold Alloys
    - Iridium and Alloys
      - Iridium
    - Palladium and Alloys
      - Palladium
      - Palladium Alloys
        
        Palladium Alloys
        
        Palladium Alloys
        
        Palladium Alloys
    - Platinum and Alloys
      - Platinum
      - Platinum Alloys
        
        Platinum Alloys
    - Rhodium and Alloys
      - Rhodium
      - Rhodium Alloys
    - Ruthenium and Alloys
      - Ruthenium
    - Silver and Alloys
      - Silver
      - Silver Alloys
        
        Silver Alloys
        
        Silver Alloys
        
        Silver Alloys
        
        Silver Alloys
        
        Silver Alloys
        
        Silver Alloys
        
        Silver Alloys
        
        Silver Alloys
  - Refractory and Reactive Metals and Alloys
    - Hafnium and Alloys
      - Hafnium
      - Hafnium Alloys
    - Molybdenum and Alloys
      - Molybdenum
      - Molybdenum Alloys
        
        Molybdenum Alloys
        
        Molybdenum Alloys
    - Niobium and Alloys
      - Niobium
      - Niobium Alloys
        
        Niobium Alloys
        
        Niobium Alloys
        
        Niobium Alloys
    - Tantalum and Alloys
      - Tantalum
      - Tantalum Alloys
        
        Tantalum Alloys
        
        Tantalum Alloys
    - Titanium and Alloys
      - Titanium
      - Titanium Alloys
        
        Titanium Alloys
        
        Titanium Alloys
        
        Titanium Alloys
    - Tungsten and Alloys
      - Tungsten
      - Tungsten Alloys
    - Zirconium and Alloys
      - Zirconium
      - Zirconium Alloys
        
        Zirconium Alloys
        
        Zirconium Alloys
  - Rhenium
  - Shape Memory Alloys
  - Solder Alloys
    - Cadmium-Based Solders
    - Lead-Based Solders
    - Tin-Based Solders
    - Zinc-Based Solders
  - Thermostat and Electrical Heating Alloys
    - Electrical Heating Alloys
    - Thermostat Metals
  - Vanadium and Alloys
    - Vanadium
  - Zinc and Alloys
    - Zinc
      - Commercial Grade Zinc
      - Galvanizing Grade Zinc
    - Zinc Alloys
      - Zinc-Aluminum Alloys
        
        Zinc-Aluminum Alloys
        
        Zinc-Aluminum Alloys
      - Zinc-Antimony Alloys
      - Zinc-Copper Alloys
      - Zinc-Tin Alloys
- Minerals and Natural Resources
  - Minerals
    - Gemstones
      - Sapphire
    - Metalliferous Minerals
      - Chromium Ores
      - Copper Ores
      - Iron Ores
      - Lead and Zinc Ores
      - Manganese Ores
      - Uranium Ores
    - Non-Metalliferous Minerals
      - Clay Minerals
        
        Clay Minerals
        
        Clay Minerals
        
        Clay Minerals
        
        Clay Minerals
      - Silicate Minerals
        
        Silicate Minerals
        
        Silicate Minerals
        
        Silicate Minerals
        
        Silicate Minerals
    - Non-Silicate Minerals
      - Carbonate Minerals
        
        Carbonate Minerals
        
        Carbonate Minerals
      - Sulfate Minerals
        
        Sulfate Minerals
    - Phosphate Minerals
      - Hydroxylapatite
  - Rocks
    - Igneous Rocks
      - Granite
      - Pumice
    - Metamorphic Rocks
      - Marble
      - Quartzite
      - Slate
    - Sedimentary Rocks
      - Limestone
        
        Limestone
        
        Limestone
        
        Limestone
      - Sandstone
      - Shale
  - Sediments
    - Fluvial Sediments
    - Marine Sediments
  - Soils
    - Coarse-Grained Soils
      - Gravel
      - Sand
    - Fine-Grained Soils
      - Clays
      - Silts
    - Organic Soils
      - Peats
    - Permafrost
  - Water
    - Drinking Water
    - Fresh Water
      - Groundwater
      - Surface Water
        
        Surface Water
        
        Surface Water
        
        Surface Water
        
        Surface Water
        
        Surface Water
        
        Surface Water
        
        Surface Water
    - Industrial Water
      - Boiler Feedwater
      - Brine
      - Cooling Water
      - High-Purity Water
    - Salt Water
      - Brackish Water
      - Seawater
- Plastics and Rubber
  - Cellular Plastics and Elastomers
    - Polyisocyanurate Foams
  - Degradable Plastics
    - Biodegradable Plastics
    - Hydrolytically Degradable Plastics
    - Oxidatively Degradable Plastics
    - Photodegradable Plastics
  - Plastics
    - Cellulosic Plastics
    - Polymer Blends and Alloys
      - Polymer Alloys
      - Polymer Blends
    - Thermoplastics
      - Acetal Plastics
        
        Acetal Plastics
      - Acrylic Plastics
        
        Acrylic Plastics
      - Fluoroplastics
        
        Fluoroplastics
        
        Fluoroplastics
        
        Fluoroplastics
        
        Fluoroplastics
        
        Fluoroplastics
        
        Fluoroplastics
        
        Fluoroplastics
        
        Fluoroplastics
        
        Fluoroplastics
      - Liquid Crystal Polymers
      - Olefin Plastics
        
        Olefin Plastics
        
        Olefin Plastics
        
        Olefin Plastics
        
        Olefin Plastics
        
        Olefin Plastics
        
        Olefin Plastics
        
        Olefin Plastics
        
        Olefin Plastics
        
        Olefin Plastics
        
        Olefin Plastics
        
        Olefin Plastics
        
        Olefin Plastics
        
        Olefin Plastics
      - Polyamide Plastics
        
        Polyamide Plastics
        
        Polyamide Plastics
        
        Polyamide Plastics
      - Polyamide-Imide Plastics
      - Polyether Plastics
        
        Polyether Plastics
        
        Polyether Plastics
        
        Polyether Plastics
      - Polyetherimide Plastics
      - Polysulfides
        
        Polysulfides
      - Polysulfones
        
        Polysulfones
        
        Polysulfones
      - Styrenic Plastics
        
        Styrenic Plastics
        
        Styrenic Plastics
        
        Styrenic Plastics
        
        Styrenic Plastics
        
        Styrenic Plastics
      - Thermoplastic Polyesters
        
        Thermoplastic Polyesters
        
        Thermoplastic Polyesters
      - Vinyl Plastics
        
        Vinyl Plastics
        
        Vinyl Plastics
    - Thermosetting Plastics
      - Alkyd Resins
      - Allyl Plastics
      - Amino and Furan Resins
        
        Amino and Furan Resins
        
        Amino and Furan Resins
      - Epoxy Resins
      - Imide Resins
      - Phenolic Plastics
        
        Phenolic Plastics
      - Polyurethane
      - Silicone Resins
      - Thermosetting Polyesters
        
        Thermosetting Polyesters
        
        Thermosetting Polyesters
  - Plastics Products
    - Molded and Extruded Products
      - Plastic Bottles
      - Plastic Containers
      - Plastic Film, Sheet and Tapes
      - Plastic Panels
      - Plastic Pipes and Tubes
        
        Plastic Pipes and Tubes
      - Plastic Plates
      - Plastic Rods and Bars
    - Plastic Lumber
    - Plastic Profiles
  - Recycled Plastics and Rubber
    - Recycled Plastics
    - Recycled Rubber
      - Crumb Rubber
      - Recycled Vulcanizate Particulate Rubber
  - Rubber and Rubber-Like Materials
    - Natural Rubber
    - Rubber Latex
      - Natural Rubber Latex
      - Synthetic Rubber Latex
    - Synthetic Rubber
      - Butadiene Rubber
      - Butyl Rubber
        
        Butyl Rubber
        
        Butyl Rubber
      - Chloroprene Rubber
      - Ethylene-Propylene Rubber
        
        Ethylene-Propylene Rubber
        
        Ethylene-Propylene Rubber
      - Fluorocarbon Rubber
      - Hydrogenated Nitrile Butadiene Rubber
      - Nitrile Rubber
      - Polyethylene Elastomers
        
        Polyethylene Elastomers
      - Polyurethane Rubber
      - Silicone Rubber
      - Styrene-Butadiene Rubber
        
        Styrene-Butadiene Rubber
        
        Styrene-Butadiene Rubber
    - Thermoplastic Elastomers
  - Rubber Products
    - Condoms
    - Finger Cots
    - Rubber Discs and Diaphragms
    - Rubber Gloves
    - Rubber Hoses and Belts
      - Rubber Hoses
    - Rubber Pads and Mounts
    - Rubber Rings
      - O-Rings
    - Rubber Seals and Adhesives
      - Rubber Cements
      - Rubber Seals
    - Rubber Sheets and Bales
      - Rubber Bales
      - Rubber Sheets
    - Rubber Tapes and Membranes
    - Rubber Threads
- Wood, Paper and Pulp
  - Paper and Paper Products
    - Coated Paper
    - Felt Paper
    - Insulation Paper
    - Office Paper
      - Duplicator Paper
        
        Duplicator Paper
        
        Duplicator Paper
      - Printing and Writing Paper
        
        Printing and Writing Paper
        
        Printing and Writing Paper
        
        Printing and Writing Paper
    - Packaging Paper
    - Paperboards
      - Corrugated Fiberboards
    - Tissue Paper
  - Pulp
  - Wood
    - Hardwood
    - Softwood
  - Wood Products
    - Lumber and Engineered Wood Products
      - Composite Wood Products
        
        Composite Wood Products
      - Glued Structural Members
        
        Glued Structural Members
        
        Glued Structural Members
        
        Glued Structural Members
      - Lumber
      - Wood Veneer and Veneer-Based Materials
        
        Wood Veneer and Veneer-Based Materials
    - Particulate Wood Fuels
    - Wood Assemblies
    - Wood Panel Products
      - Fiber and Particle Panel Materials
        
        Fiber and Particle Panel Materials
        
        Fiber and Particle Panel Materials
        
        Fiber and Particle Panel Materials
        
        Fiber and Particle Panel Materials
      - Structural Wood Panels
    - Wood Pole and Pile Products
Process
- Biological Process
  - Aging
    - Degradation/Deterioration
  - Detoxification
  - Fermentation
  - Germination
  - Microbial Growth
    - Algal Growth
    - Bacterial Growth
    - Fungal Growth
  - Photosynthesis
  - Reproduction
  - Sterilization and Disinfection
- Chemical Process
  - Acid Digestion
  - Alkylation
  - Calcination
  - Carbonization
  - Catalysis
  - Chemical Reaction
    - Acetylation
    - Alkali-Aggregate Reaction
    - Disproportionation
    - Reduction
    - Sulfation
  - Cracking
    - Catalytic Cracking
    - Pyrolysis
  - Crosslinking
  - Curing
  - Decomposition
  - Dehydration
  - Dissolution
  - Doping and Etching
  - Efflorescence
  - Emulsification
  - Encapsulation
  - Esterification
  - Fouling and Scaling
  - Halogenation
    - Chlorination
  - Hydration
  - Hydrolysis
  - Ignition and Combustion
  - Neutralization
  - Nitration
  - Oxidation
  - Photolysis
  - Polymerization
  - Staining
- Contamination and Decontamination
  - Contamination
    - Chemical Contamination
    - Groundwater Contamination
    - Microbial Contamination
    - Radioactive Contamination
    - Soil Contamination
  - Decontamination
- Corrosion
  - Localized Corrosion
    - Cavitation Corrosion
    - Crevice Corrosion
    - Erosion Corrosion
    - Filiform Corrosion
    - Fretting Corrosion
    - Galvanic Corrosion
    - Intergranular Corrosion
    - Pitting Corrosion
    - Stress Corrosion Cracking
  - Uniform Corrosion
    - Atmospheric Corrosion
- Electrochemical Process
- Manufacturing Process
  - Additive Manufacturing
    - Direct Metal Laser Sintering
    - Directed Energy Deposition
    - Electron Beam Melting
    - Powder Bed Fusion
    - Selective Laser Melting
  - Braiding
  - Casting
    - Centrifugal Casting
    - Continuous Casting
    - Die Casting
    - Investment Casting
    - Permanent Mold Casting
    - Sand Casting
    - Semi-Solid Casting
      - Rheo Casting
      - Squeeze Casting
      - Thixo Casting
    - Twin-Roll Casting
  - Coking
  - Cutting
  - Filament Winding
  - Forming
    - Blanking
    - Drawing
    - Extrusion
      - Coextrusion
    - Forging
      - Closed Die Forging
      - Swaging
    - Milling
    - Pultrusion
    - Rolling
      - Cold Rolling
      - Hot Rolling
  - Glazing
  - Grinding and Crushing
  - Heat Treatment
    - Annealing
    - Hardening/Diffusion Coating
      - Boriding
      - Carburizing/Decarburizing
      - Induction Hardening
      - Nitriding
    - Isothermal Treatment
      - Austempering
    - Normalizing
    - Precipitation Hardening
    - Quenching
    - Tempering
  - Joining
    - Adhesive Bonding
    - Bolting and Riveting
    - Brazing and Soldering
    - Splicing
    - Welding
      - Arc Welding
      - Electrofusion
      - Fusion Welding
      - Laser Welding
      - Resistance Welding
  - Knitting
  - Lamination
  - Lithography
  - Machining
  - Manufacturing Defects
    - Distortion
    - Inclusions
      - Non-Metallic Inclusions
    - Pinholes and Voids
    - Surface Defects
      - Surface Flaws
    - Warpage
  - Metal Smelting and Refining
    - Refining
      - Basic-Oxygen Process
      - Decarburization
      - Electrorefining
      - Electroslag Refining Process
      - Ladle Refining
      - Vacuum Degassing
      - Vacuum Melting
    - Smelting
      - Blast-Furnace Process
      - Cupola Process
      - Electric-Furnace Process
  - Molding
    - Blow Molding
    - Compression Molding
    - Contact Molding
    - Extrusion Molding
    - Injection Molding
    - Transfer Molding
  - Polishing and Buffing
  - Powder Metallurgy
    - Hot Forging
    - Metal Injection Molding
    - Pressing
      - Cold Isostatic Pressing
      - Hot Isostatic Pressing
      - Isostatic Pressing
      - Uniaxial Pressing
    - Sintering
  - Pulverization
  - Surface Treatment
    - Cleaning
      - Chemical Cleaning
      - Ultrasonic Cleaning
    - Coating
      - Cladding
      - Electrolytic Process
      - Electrostatic Spray Coating Method
      - Enameling
      - Hot-Dip Process
      - Metallic Coating
      - Non-Metallic Coating
      - Thermal Spray Coating
    - Descaling
    - Passivation
    - Pickling
    - Shot Peening
    - Vapor Degreasing
  - Tanning
  - Vacuum/Vapor Deposition
    - Chemical Vapor Deposition
    - Physical Vapor Deposition
      - Electron Beam Physical Vapor Deposition
  - Vulcanization
  - Weaving
  - Wire Bonding
- Mechanical Process
  - Adhesion and Cohesion
  - Buckling
  - Compression
  - Crack Initiation and Propagation
    - Crack Growth and Propagation
    - Crack Initiation
    - Cracks and Cracking
  - Creep
  - Deformation
    - Plastic Deformation
  - Drilling
  - Failure
    - Delamination
    - Embrittlement
      - Hydrogen Embrittlement
      - Radiation Embrittlement
    - Fatigue
      - Corrosion Fatigue
      - Cyclic Fatigue
      - Fretting Fatigue
      - Thermal Fatigue
    - Fracture
      - Non-Linear Elastic Fracture
  - Friction
    - Kinetic Friction
  - Impact
  - Torsion
  - Vibration
    - Damping
- Nuclear Process
  - Fission
  - Fusion
- Physical Process
  - Air Entrainment
  - Capillary Action and Wicking
  - Cavitation
  - Cooling
  - Deflection
  - Diffusion
  - Dispersion
  - Drying and Dessication
  - Expansion
  - Heat Transfer
    - Heat Convection
    - Heat Radiation
  - Laser-Induced Damage
  - Leakage
    - Water Leakage
  - Luminescence
    - Chemiluminescence
    - Photoluminescence
  - Mixing and Blending
    - Agitation
  - Outgassing
  - Penetration
    - Water Penetration
  - Permeation
  - Phase Transformation
    - Condensation
    - Freezing and Thawing
    - Gelation
    - Melting
    - Recrystallization and Crystallization
    - Solidification
    - Vaporization
      - Boiling
      - Evaporation
  - Radiation
    - Nuclear Irradiation
      - Electron Irradiation
      - Ion Irradiation
      - Neutron Irradiation
    - Optical Radiation
      - Infrared Radiation
      - Ultraviolet Radiation
    - Thermal Radiation
  - Radiation Damage
  - Scattering
  - Segregation and Inoculation
  - Sieving and Grading
  - Sorption
    - Absorption
    - Adsorption and Desorption
  - Sputtering
    - Ion-Beam Sputtering
  - Swelling
  - Wave Phenomena
    - Attenuation
    - Diffraction
    - Propagation
    - Reflection and Transmission
    - Resonance
  - Weathering
    - Disintegration
    - Rutting
  - Wetting
  - Work Hardening
- Separation and Purification
  - Centrifugation
  - Coagulation and Flocculation
  - Distillation
    - Fractional Distillation
    - Vacuum Distillation
  - Electrolysis
  - Extraction
    - Leaching
    - Liquid-Liquid Extraction
    - Solid-Phase Extraction
    - Supercritical Fluid Extraction
  - Filtration
    - Microfiltration
    - Nanofiltration
    - Reverse Osmosis
    - Ultrafiltration
  - Flotation
  - Ion Exchange
  - Precipitation
  - Sedimentation
  - Stripping
- Specimen Preparation
  - Sample Conditioning
- Wear and Erosion
  - Abrasive Wear
  - Adhesive Wear
    - Galling Wear
    - Sliding Wear
    - Spalling Wear
  - Erosion
    - Cavitation Erosion
    - Liquid Impingement Erosion
  - Fretting Wear
  - Impact Wear
  - Tread Wear
Properties and Measurements
- Acoustic Properties
  - Acoustic Impedance
  - Sound Transmission Loss
  - Sound, Noise
  - Speed of Sound
- Biological Properties
  - Bioavailability
  - Biocompatibility
  - Biodegradability
    - Aerobic Biodegradability
    - Anaerobic Biodegradability
  - Biological Efficacy
  - Microbial and Antimicrobial Activity
  - Toxicity
    - Cytotoxicity
    - Ecotoxicity
    - Effective Concentration
    - Lethal Concentration
    - Lethal Dose
    - Neurotoxicity
    - Phytotoxicity
- Chemical Properties
  - Acidity
  - Alkalinity
  - Atomic and Molecular Properties
    - Molecular Mass
  - Basicity
  - Bromine Number
  - Cation Exchange Capacity
  - Chemical Compatibility
  - Chemical Composition
    - Additive Elements
    - Ash Content
    - Inorganic Matter Content
    - Insoluble Matter Content
    - Isotopic Composition
    - Moisture Content
    - Organic Matter Content
    - Trace Elements
    - Volatile Matter Content
      - Volatile Organic Compounds
    - Water and Sediment Content
  - Chemical Resistance
    - Oxidation Stability
  - Cloud Point
  - Iodine Number
  - Kinetics
    - Activation Energy
    - Pre-Exponential Factor
    - Reaction Rate
    - Reactivity
  - Leachability
  - Maceral Composition
  - Methylene Blue Index
  - Miscibility
  - Partition Coefficient
  - pH
  - Purity
  - Salinity
  - Saponification Number
  - Solubility
  - Volatility
  - Water Hardness
- Combustion Properties
  - Cetane Number and Cetane Index
  - Fire Point
  - Flame Spread
  - Flammability
  - Flash Point
  - Heat of Combustion
  - Ignitability
  - Octane Number
  - Oxygen Compatibility
  - Oxygen Index
  - Smoke Point
- Dimensionless Numbers and Physical Constants
  - Damping Ratio
  - Physical Constants
  - Water-Cement Ratio
- Electrical Properties
  - Capacitance
  - Dielectric Properties
    - Dielectric Constant
    - Dielectric Strength
    - Permittivity
  - Dissipation Factor
  - Electrical Conductivity
  - Electrical Resistivity
  - Voltage, Current and Power
- Electrochemical Properties
  - Corrosion Resistance
  - Corrosivity
  - Electrochemical Noise
  - Electrochemical Potential
  - Oxidation-Reduction Potential
  - Polarization Resistance
- Geotechnical Properties
  - Atterberg Limits
    - Liquid Limit
    - Plastic Limit
  - Coefficient of Consolidation
  - Hydraulic Conductivity
  - Plasticity Index
  - Pore Size Distribution
  - Pore Water Pressure
- Magnetic Properties
  - Coercivity
  - Core Loss
  - Hysteresis
  - Magnetic Field Strength
  - Magnetic Permeability
  - Magnetization
- Mechanical Properties
  - Abrasivity
  - Brittleness
  - Castability and Moldability
  - Compliance
  - Damping Capacity
  - Ductility
  - Elasticity
    - Compressive Modulus
    - Flexural Modulus
    - Modulus of Elasticity
    - Poisson's Ratio
    - Resilience
    - Shear Modulus
    - Superelasticity
    - Young's Modulus
  - Formability and Extrudability
  - Hardenability
    - End-Quench
  - Hardness
    - Brinell Hardness
    - Knoop Hardness
    - Leeb Hardness
    - Pfund Hardness
    - Rockwell Hardness
    - Vickers Hardness
  - Machinability
  - Plasticity
  - Skid/Frictional Resistance
  - Stiffness
    - Flexural Stiffness
    - Shear Stiffness
    - Torsional Stiffness
  - Strength
    - Bearing Strength
    - Bond Strength
    - Burst Strength
    - Bursting Strength
    - Compressive Strength
    - Creep Strength
    - Fatigue Strength
    - Flexural/Bend Strength
    - Freeze-Thaw Resistance
    - Impact Strength
    - Residual Strength
    - Shear Strength
    - Tear Strength
    - Tensile Strength
  - Stress and Strain
    - Compressive Stress
    - Residual Stress
    - Shear Stress
    - Strain Rate
    - Stress-Intensity Factor
    - Tensile Stress
    - Thermal Stress
  - Toughness
    - Fracture Toughness
    - Notch Toughness
  - Wear and Erosion Resistance
  - Weldability/Solderability
- Metallurgical Properties
  - Crystal Structure and Defects
    - Crystal Structure
    - Linear Defects
  - Grain Size
  - Microstructure
    - Grain Boundary
- Optical Properties
  - Absorbance and Absorption Coefficient
  - Birefringence
  - Hiding Power
  - Lightfastness
  - Luminance
  - Opacity and Transmittance
  - Optical Density
  - Reflectance and Reflectivity
  - Refractive Index
  - Tinting Strength
- Performance Characteristics
  - Airtightness
  - Filtration Efficiency
  - Sealability
  - Service Life
  - Serviceability Index
  - Setting Time
  - Shelf Life
  - Weatherability
- Physical Properties
  - Anisotropy
  - Appearance
  - Cleanliness
  - Compatibility
  - Compressibility
  - Density and Relative Density
    - API Gravity
    - Bulk Density
  - Diffusivity
  - Dimension
    - Depth
    - Diameter
    - Height
    - Length
    - Size
    - Thickness
    - Width
  - Displacement
  - Distance, Speed and Acceleration
  - Dose and Dose Rate
  - Durability
  - Energy
  - Fiber Characteristics
    - Micronaire
  - Fineness
  - Force, Pressure
  - Friability, Grindability
  - Fusibility
  - Gravity
  - Humidity
    - Dew Point
    - Relative Humidity
  - Hydraulic Transmissivity
    - LNAPL Transmissivity
  - Mass, Volume and Weight
  - Particle Size Distribution
  - Permeability
  - Phase Transition Temperature
    - Boiling Point
    - Glass Transition Temperature
    - Melting Point
    - Pour Point
    - Softening Point
    - Solidification Point
  - Porosity
  - Radioactivity
  - Shrinkage
  - Stability
    - Dimensional Stability
    - Storage Stability
  - Storage Coefficient
  - Temperature
  - Turbidity
  - Vapor Pressure
    - Reid Vapor Pressure
  - Void Ratio
  - Water Vapor Transmission Rate
  - Wavelength and Frequency
- Radiological Properties
  - Flux and Fluence
    - Neutron Fluence
    - Neutron Flux
- Rheological Properties
  - Flow Rate
  - Pumpability
  - Shear Stability
  - Storage Modulus
  - Viscoelasticity
  - Viscosity
    - Dynamic Viscosity
    - Kinematic Viscosity
    - Viscosity Index
- Sensorial Properties
  - Brightness
  - Color
  - Flavor
  - Gloss and Haze
  - Odor
  - Taste
  - Visual Perception
- Surface Properties
  - Impact Attenuation
  - Surface Area
    - Specific Surface Area
  - Surface Roughness
  - Surface Tension
  - Surface Texture
- Thermal and Thermodynamic Properties
  - Cooling Rate
  - Emittance and Emissivity
  - Enthalpy
  - Heat Capacity
  - Heat Flux
  - Heat of Fusion
  - Heat of Hydration
  - Heat of Sublimation
  - Heat of Vaporization
  - Heat Transfer Coefficient
  - Linear Thermal Expansion
  - Thermal Conductivity
  - Thermal Diffusivity
  - Thermal Resistivity
  - Thermal Shock Resistance
  - Thermal Stability
  - Workability
- Tribological Properties
  - Coefficient of Friction
  - Lubricity
Test Methods
- Biological Test
  - Immunoassay
  - Microbiological Test
  - Molecular Biology Techniques
    - DNA Sequencing
    - Electrophoresis
      - Capillary Electrophoresis
      - Gel Electrophoresis
    - Polymerase Chain Reaction
  - Toxicity Test
    - FETAX
- Chemical Analysis
  - Coating-Weight Test
  - Colorimetry
    - Tristimulus Colorimetry
  - Electrochemical Techniques
    - Voltammetry
      - Amperometry
  - Gravimetry
    - Fusion-Hydrochloric Acid Dehydration Method
  - Hyphenated Techniques
    - Gas Chromatography-Mass Spectrometry
    - Inductively Coupled Plasma-Atomic Emission Spectrometry
    - Scanning Electron Microscopy-Energy Dispersive X-Ray Analysis
  - Loss-on-Ignition Test
  - Oxidation Test
  - Spot Test
  - Titrimetry
    - Coulometry
      - Coulometric Karl Fischer Titration
      - Microcoulometry
    - Potentiometric Titration
    - Volumetry
      - Dichromate Titration
      - Permanganate Titration
      - Volumetric Karl Fischer Titration
  - Turbidimetry
  - Ultimate Analysis
    - Proximate Analysis
- Chromatography
  - Gas Chromatography
    - Capillary Column Gas Chromatography
    - Headspace Gas Chromatography
    - Multi-Dimensional Gas Chromatography
  - Ion Chromatography
  - Liquid Chromatography
    - HPLC
    - Supercritical Fluid Chromatography
  - Reversed-Phase Chromatography
  - Size-Exclusion Chromatography
    - Gel Permeation Chromatography
  - Thin Layer Chromatography
- Corrosion Test
  - Cabinet Test
    - Corrosive Gas Test
    - Salt Spray Test
  - Electrochemical Test
  - Immersion Test
  - Stress Corrosion Cracking Test
- Crystallography
  - Electron Diffraction Technique
  - X-Ray Diffraction Technique
- Fire Test
  - Flammability Test
  - Flash Point Test
- Geotechnical Test
  - Foundation and Pile Test
    - Dynamic Load Testing
    - Integrity Testing
    - Static Load Testing
  - Soil Test
    - California Bearing Ratio Test
    - Compaction Test
    - Cone Penetration Test
    - Direct Shear Test
    - Falling Head Permeability Test
    - Resonant Column Test
    - Sand Equivalent Test
    - Standard Penetration Test
    - Unconfined Compression Test
    - Vane Shear Test
  - Triaxial Test
    - Consolidated Drained Triaxial Test
  - Water Level Analysis
    - Aquifer Test
      - Slug Test
    - Well Test
- Mechanical Test
  - Adhesion Test
    - Peel Test
  - Bend Test
    - Flexural Test
    - Four-Point Bend Test
    - Three-Point Bend Test
  - Burst Test
  - Compression Test
  - Creep Test
  - Fatigue Test
    - Constant-Amplitude Fatigue Test
  - Fractography
    - Hardness Test
      - Brinell Hardness Test
      - Dynamic Hardness Test
      - Indentation Hardness Test
      - Knoop Hardness Test
      - Microhardness Test
      - Pencil Hardness Test
      - Rebound Hardness Test
      - Rockwell Hardness Test
      - Scleroscope Hardness Test
      - Scratch Test
      - Vickers Hardness Test
  - Impact Test
    - Charpy Test
    - Drop-Weight Test
    - Izod Test
  - Pull-Out Test
  - Puncture Test
  - Shear Test
    - Iosipescu Shear Test
    - Lap Shear Test
    - Torsional Shear Test
  - Shock and Vibration Testing
  - Small Punch Test
  - Stress Rupture Test
  - Structural Analysis
  - Tear Test
  - Tensile Test
    - Direct Tension Test
    - Grab Test
    - Indirect Tensile Test
  - Torsion Test
  - Wear Test
    - Abrasion Test
    - Erosion Test
    - Friction Test
- Metallography and Resinography
  - Fracture Analysis
  - Grain Size Analysis
    - Planimetric Method
      - Heyn Intercept Method
      - Jeffries Planimetric Method
  - Macroetch Test
  - Microscopy
    - Electron Microscopy
      - Scanning Electron Microscopy
      - Transmission Electron Microscopy
    - Optical Microscopy
      - Confocal Laser Scanning Microscopy
      - Phase Contrast Microscopy
      - Polarized Light Microscopy
      - Reflected Light Microscopy
    - Photomacrography
    - Photomicrography
    - Scanning Probe Microscopy
      - Atomic Force Microscopy
      - Scanning Tunneling Microscopy
  - Test Specimens and Test Engines
- Non-Destructive Evaluation
  - Acoustic Emission Techniques
    - Acoustic Emission Test
    - Acousto-Ultrasonics
  - Airborne Ultrasound Testing
  - Computed Tomography
  - Electromagnetic Test
    - Alternating Current Field Measurement
    - Remote Field Testing
  - Guided Wave Testing
  - Holiday Test
  - Leak Test
    - Bubble Emission Leak Test
    - Electrical Leak Location Survey
    - Halogen Leak Test
    - Helium Leak Test
    - Pressure Leak Test
  - Liquid Penetrant Testing
    - Dye Liquid Penetrant Testing
    - Fluorescent Liquid Penetrant Testing
    - Visible Liquid Penetrant Testing
  - Magnetic Particle Inspection
    - Dry Method
    - Wet Method
  - Potential Drop Method
  - Radiology
    - Digital Radiography
    - Gamma Radiography
    - Neutron Radiography
    - X-Ray Radiography
  - Thermography
    - Flash Thermography
    - Infrared Thermography
  - Ultrasonic Examination
    - Angle Beam Method
    - Phased Array Ultrasonic Testing
    - Pulse Echo Method
    - Straight Beam Ultrasonic Testing
    - Time-Of-Flight Diffraction Method
  - Visual and Optical Testing
    - Holography
    - Shearography
    - Visual Inspection
- Performance Test
  - Accelerated Aging Test
    - Pressurized Aging Vessel Test
    - Rolling Thin-Film Oven Test
  - Bench Test
  - Durability Test
  - Exposure Test
    - Accelerated Weathering Test
    - Outdoor Exposure Test
  - High-Frequency Reciprocating Rig Test
  - Insulation Test
    - Franklin Test
  - Lubricant Testing
  - Marshall Stability Test
  - Mortar Bar Test
  - Packaging Performance Testing
  - Proof Test
  - Solvent Rub Test
- Petrography
- Physical Test
  - Color Test
  - Dilatometry
  - Ellipsometry
  - Flow Table Test
  - Interferometry
  - Magnetic Testing
  - Nanoparticle Tracking Analysis
  - Particle Size Analysis
    - Non-Sieving Methods
      - Laser Diffraction Method
  - Penetration Test
  - Permeation Test
  - Photometry and Radiometry
    - Flame Photometry
  - Porosimetry
  - Sieve Analysis
    - Dry Sieve Analysis
    - Wet Sieve Analysis
  - Slump Test
- Radiochemical Analysis
  - Dosimetry
  - Isotope Analysis
  - Liquid Scintillation Counting
  - Neutron Activation Analysis
  - Radiation Hardness Test
- Sensory Evaluation
  - Discrimination Test
    - Duo-Trio Test
    - Paired Comparison Test
    - Triangle Test
- Spectroscopy
  - Absorption Spectroscopy
    - Atomic Absorption Spectroscopy
      - Cold Vapor Generation Atomic Absorption Spectroscopy
      - Flameless Atomic Absorption Spectroscopy
      - Graphite Furnace Atomic Absorption Spectroscopy
      - Hydride Generation Atomic Absorption Spectroscopy
    - Cavity Ring-Down Spectroscopy
    - Flame Atomic Absorption Spectroscopy
    - UV-Visible Molecular Absorption Spectroscopy
  - Acoustic Resonance Spectroscopy
  - Alpha Spectrometry
  - Electrochemical Impedance Spectroscopy
  - Electron Spectroscopy
    - Auger Electron Spectroscopy
    - X-Ray Photoelectron Spectroscopy
  - Emission Spectroscopy
    - Atomic Emission Spectroscopy
      - Inductively Coupled Plasma-Atomic Emission Spectroscopy
    - Optical Emission Spectroscopy
      - Inductively Coupled Plasma-Optical Emission Spectroscopy
    - X-Ray Emission Spectroscopy
  - Fluorescence/Luminescence Spectroscopy
    - X-Ray Fluorescence Spectroscopy
      - Micro X-ray Fluorescence Spectrometry
  - Gamma-Ray Spectroscopy
  - Mass Spectroscopy
    - Inductively Coupled Plasma Mass Spectrometry
    - Ionization Mass Spectroscopy
    - Isotopic Dilution Mass Spectrometry
    - Tandem Mass Spectrometry
    - Time-Of-Flight Mass Spectrometry
  - Molecular Spectroscopy
  - Nuclear Magnetic Resonance Spectroscopy
  - Secondary Ion Mass Spectrometry
    - Time-Of-Flight Secondary Ion Mass Spectrometry
  - Spectrophotometry
    - Infrared Spectrophotometry
  - UV-Visible Spectroscopy
  - Vibrational Spectroscopy
    - Infrared Spectroscopy
      - Fourier Transform Infrared Spectroscopy
    - Raman Spectroscopy
  - Visible Spectroscopy
  - X-Ray Spectroscopy
    - Energy-Dispersive X-Ray Spectroscopy
    - Wavelength Dispersive X-Ray Spectroscopy
- Surface Analysis
- Test Specimens and Test Engines
- Thermal Analysis
  - Calorimetry
    - Differential Scanning Calorimetry
    - Oxygen Consumption Calorimetry
  - Differential Thermal Analysis
  - Dynamic Mechanical Analysis
  - Thermogravimetry
  - Thermomechanical Analysis
  - Thermometry

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