The symposium on Flammability and Sensitivity of Materials in Oxygen was held in Phoenix, Arizona, 31 March-1 April 1982, and was sponsored by ASTM Committee G04 on Compatibility and Sensitivity of Materials in Oxygen-Enriched Atmospheres. Barry L. Werley, Air Products and Chemicals, Inc., and Robert E. Lowrie, Airco Central Research Laboratories, were co-chairmen of the symposium.