Thomas J. Watson founder and chairman of IBM was awarded the highest Nazi award for a forigen citizen due to his aid in computerizing Germany. During the war he continued to profit from moneys sent to him via switzerland from his Nazi controlled German subsidiary. Without IBM punchcard technology, there could have been no German war effort, Train system and concentration camps, the logistics would have been overwhelming. Of course it was his computers that planned allied bombing routes and D-day as well. The world it seems is less than black and white.

there were NO IBM computers in WW2. IBM didn't even start making computers until the late 50s IMHO.

Punchcards? not until the 60s.

, computers in WW2 were used for two things only:

cryptoanalasys by the british, and balistic calculations by the US navy.