"Fun" fact: It was IBM who helped tabulate data from the 1933 national census, which was then used to identify hundreds of thousands more Jews than would have been found by the Nazi party without their efforts.
"Machine-tabulated census data greatly expanded the estimated number of Jews in Germany by identifying individuals with only one or a few Jewish ancestors. Previous estimates of 400,000 to 600,000 were abandoned for a new estimate of 2 million Jews."
[0]: https://en.wikipedia.org/wiki/IBM_and_the_Holocaust