Yes IBM. But if you are considering reading this book I would suggest that it might be a waste of time, unless you are a true disbeliever or are doing research on the topic.

Mr Black is angry at IBM and does not try to hide it in his writing. He writes as if he is a prosecutor trying to convince a jury in court. Very frequently and repetitively, he describes the Holocaust and explains why what the reader just read proves that IBM or some of its executives are guilty of murder. I find it insulting to have these conclusions handed to me, even if I don't disagree with them. The repetition gets boring quickly.