My Uncle Richard worked for Hughes Aircraft in El Segundo as a computer programmer (he couldn't talk about his job per se) back in the 60s/70s, when I was little. They had a Cray front/back (?) end that they used for all of their testing and modeling, I guess.
I always remember him giving my brother, sisters and I, big stacks for their computer paper to color and draw on when we went over there for Thanksgiving.
We had stacks of that stuff at home.
Chris