IBM and the U.S. Data Processing Industry: An Economic History. By Franklin M. Fisher, James W. McKie and Richard B. Mancke. (New York: Praeger Publishers, 1983. xii + 532 pp. $37.95.) - Memories That Shaped an Industry: Decisions Leading to IBM System/360. By Emerson W. Pugh. (Cambridge: MIT Press, 1984. x + 323 pp. $25.00.)