I worked on the Hubbles grandfather, OAO-A2. It was the first successful
orbiting observatory. We used to command it through a computer that was
obsolete even in 1970 called an ADECS-37 (Adaptable Digital Electronic
Computer) made by General Mills who also make corn flakes. It was a
mighty system, 4K of 37 bit memory, a drum, a tape unit, a special box
to format the spacecraft commands, a line printer (80 column), a paper
tape reader and punch, and a typewriter. I learned to fix mainframes and
write machine language code on that machine.
It was a long way from today.