This Day in History
January 18, 1938
J.W. Bryce Outlines the Harvard Mark I
J.W. Bryce writes a memorandum formalizing IBM's development of a computing machine for Harvard: the Harvard Mark I, completed in 1944. The Harvard Mark I was the first fully automatic machine to be completed and computed three additions or subtractions a second; its memory stored 72 numbers. Several of J.W. Bryce's major inventions—high-speed multiplying, dividing, cross adding, the read-out, and the emitter—were utilized in the Harvard Mark I.