IBM and the Holocaust
The Strategic Alliance Between Nazi Germany and America's Most Powerful Corporation
By Edwin Black
Three Rivers Press, (2002)
ISBN: 0609808990
IBM as a company would know the innermost details of Hitler's Hollerith operations, designing the programs, printing the cards, and servicing the machines. But Watson and his New York directors could erect a wall of credible deniability ... The free flow of information, instructions, requests, and approvals by Watson remained detailed and continuous for years to come - well into 1944. (Pg. 458.)