The writer of last year's controversial book IBM and the Holocaust claims that he has new evidence that Big Blue did act with prior knowledge and complicity with wartime atrocities in Poland.
Edwin Black claims that newly discovered documents from US National Archives, and eye witness accounts from Poland, add further details to IBM's role in supplying machinery used in the process of murdering millions of people.
Black claims the IBM Hollerith mainframe, the biggest of its time, was supplied to the Nazis through an IBM subsidiary in Germany known as Watson Business Machines, which liaised with the US through IBM in Geneva.
The Holleriths were used to make calculations, such as in the transportation of people to concentration camps or to work out the number of deaths possible per square kilometre through systematic mass starvation.
"This is the proof that IBM enabled the Holocaust. The connection to New York is now proven," researcher Robert Wolfe told Reuters.
Several historians and Jewish groups have called on IBM to apologise for its close relationship with the Third Reich, but the company is sticking to the line it took last year when the first edition of the book came out.
IBM says it lost control of its German operation after Hitler came to power in 1933 and that it abhorred the activities of the Nazis.
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