[DSpinellis]

Pipe-related concepts in various restricted forms were floating around for years. Doug McIlroy indeed proposed them in 1964 and was heading the Bell Labs team when they were implemented in the Third Research Edition of Unix (1973).

See https://youtu.be/FbDebSinSQo?si=xbWIqES80hI2S802&t=901

[emmelaich]

Sure, but in and out of control structures? I think that's the major point your parent was making.