American Mathematical Society
Committee to choose hour speakers for central sectional meetings, 1974-1977, 1982-1983 Committee on committees, 1983-1984
Vice President 1986-1987
Committee on Mathematical History, 1987-1991 Committee on Libraries 1989-
Committee on Collected Works 1990-
Mathematical Association of America
Committee to choose Hedrick Lecturer, 1978-1980 Committee on The Chauvenet Prize, 1986-1988 Program Committee for San Antonio meeting Jan. 1993 AMS-MAA
Joint Committee for AMS-MAA Lecturers, January 1993, January 1994 SIAM
Editorial Board, SIAM Journal of Mathematical Analysis, 1969-1993 Polya Prize Committee, 1993
AMERICAN ASSOCIATION FOR ADVANCEMENT OF SCIENCE AMS representative to History and Philosophy of Science Section 1990-1992 Member at-large of Mathematics Section Executive Committee, 1992-