Tom Watson Jr, longtime head of IBM, writes (in his autobioraphy) about his personal encounter with McCarthyism in the 1950s:
There was a moment when I truly thought IBM was going to lose its shot at defense work because of the kind of window blinds I had in my office.
These were vertical blinds, which were not common at the time. An engineer who was in Watson’s office for a meeting made a sketch of the blinds, and inadvertently left it in his shirt pocket when he took the shirt to the dry cleaner. The laundry man thought the paper looked suspicious, and sent it to McCarthy. Pretty soon, a group of investigators came and said to the engineer, “We’ve identified this as a plan for a radar antenna, and want to hear about it. We want to be perfectly fair. But we know it is a radar antenna and the shirt it was found in belongs to you.”
The engineer explained about the vertical blinds, and the investigation team then asked to see Watson. The chief executive officer of IBM showed them the blinds and demonstrated the way they worked.
They looked them over very carefully and then left. I thought I had contained it, but I wasn’t sure, and I was scared. We were working on SAGE (the computerized air defense system–ed) and it would have been a hell of a way to lose our security clearance.
Good thing that we don’t live in such hysterical times, and that nothing so crazy could happen today. Right?