Originally Posted by Rundstedt

IBM was in league with the Third Reich in data collection of Jews and other undesirables. So at least one American company knew what the information was for. I saw a documentary on the concentration camps and i was amazed that the allies had known as early as 1942 that the concentation and extermination camps existed, and as far as i know only one mission was authorised to attack Birkenau but the Allies conceded that the elimination of Germany's capacity to wage war was far more important that to attack concentration camps.