Erwin O. Kreyszig had 5 appointments :

Board of Directors		1977 - 1983
Publications Ad-Hoc Committees		1980 - 1984	, served as chair
Publications Committee		1980 - 1984	, ex-officio
Conference Proceedings Series and Book Series Editors-in-Chief		1984 - 1989
Board of Directors		1987 - 1989