I’m pretty sure it was here that I read how cray would drive on a family trip and insist the kids stay silent while he drove and designed much the cray in his head on the drive… if anyone has a link would love to re read that story
By the time the Cray-1 was designed, Seymour Crays children where in college. This might have applied to when he was designing the CDC 6600 when the children were younger. I know this because the Cray kids were a couple years ahead of me in high school. There are a lot of stories like this put out by John Rollwagen to build up Seymour's design creds.