Editing Tabulating machine (section)

==Further reading==
*{{cite book |last= Fierheller |first= George A.
|title= Do not fold, spindle or mutilate: the "hole" story of punched cards |publisher=  Stewart Pub. |year= 2014 |isbn= 978-1-894183-86-4 |url =http://www.gfierheller.ca/wp-content/uploads/2014/02/Do-Not-Fold-Feb-7-2014-web.pdf|archive-url=https://web.archive.org/web/20160324204616/http://www.gfierheller.ca/wp-content/uploads/2014/02/Do-Not-Fold-Feb-7-2014-web.pdf|archive-date=2016-03-24}} An accessible book of recollections (sometimes with errors), with photographs and descriptions of many unit record machines. The chapter ''It all adds Up'' describes IBM tabulators and accounting machines.
*{{cite journal |last= Kistermann |first= F.W.
|title= The way to the first automatic sequence-controlled calculator: the 1935 DEHOMAG D 11 tabulator |journal= Annals of the History of Computing |volume= 17 |issue= 2 |date= Summer 1995 |pages= 33–49 |doi = 10.1109/85.380270}}
*{{cite book |editor-last= Randell |editor-first= Brian
|title= The Origins of Digital Computers, Selected Papers, 3rd ed |publisher= Springer-Verlag |year= 1982 |isbn = 0-387-11319-3}}  Chapter 3, ''Tabulating Machines'', has excerpts of Hollerith's 1889 ''An Electric Tabulating System'' and Couffignal's 1933 ''Calculating Machines: Their Principles and Evolution''.
*Black, Edwin (2001) ''[[IBM and the Holocaust|IBM and the Holocaust: The Strategic Alliance Between Nazi Germany and America's Most Powerful Corporation]],'' Crown Pub, {{ISBN|0-609-80899-0}}''.'' Assiduously footnoted using 20,000 hard copy documents and utilizing over 100 researchers, the book pieces together fragments of information from all of the world deliberately obscured to prevent the exposure of the extent to which IBM president Thomas J. Watson collaborated with the Nazis to identify Jews, locate them, determine what personal effects they owned, what businesses they controlled, their real estate, and anything else of value that could be seized by the Nazis. IBM tabulators also made it possible to move millions of Jews to their deaths in concentration camps using hundreds of thousands of rail cars and tons of coal in a process that would have been impossible without IBM. All the concentration camps contained offices specifically for the running and repair of the IBM tabulators which kept track of the age, gender and manner of death of every inmate. These machines, as well as other used by the German military, were leased to the Nazis in what became millions of dollars of profit for IBM.