The symposium on Progress in Quantitative Surface Analysis was held on 2—3 March 1977 in conjunction with the Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy in Cleveland, Ohio. The symposium was sponsored by the American Society for Testing and Materials through its Committee E42 on Surface Analysis. N. S. McIntyre, Atomic Energy of Canada Limited and vice-chairman (publications) of ASTM Committee E42, served as symposium chairman and editor of this publication. J. R. Cuthill, National Bureau of Standards and chairman of Committee E42, David Hercules, University of Pittsburgh, and G. G. Sweeney, Westinghouse Research Laboratories, served as session chairmen. Papers from the symposium as well as appropriate papers from the regular Pittsburgh Conference sessions on surface analysis are included in this special technical publication.