Makin' numbers

This collection of technical essays and reminiscences is a companion to I. Bernard Cohen's biography Howard Aiken: Portrait of a Computer Pioneer. After an overview by Cohen, Part I presents the complete publication of Aiken's 1937 proposal for an automatic calculating machine, later realized as the Mark I, as well as recollections by the chief engineer in charge of construction of Mark II, Robert Campbell, and the programmer of Mark I, Richard Bloch. Henry Tropp describes Aiken's hostility to the exclusive use of binary numbers in computational systems and his alternative approach.