[robotguy]

Seeing the disk IO animation reminded me of Melvin Kaye[0]:

  Mel never wrote time-delay loops, either, even when the balky Flexowriter
  required a delay between output characters to work right.
  He just located instructions on the drum
  so each successive one was just past the read head when it was needed;
  the drum had to execute another complete revolution to find the next instruction.
  

[0] https://pages.cs.wisc.edu/~markhill/cs354/Fall2008/notes/The...

[Thoreandan]

I was reminded of Mel as well! If you haven't seen it, Usagi Electric on YouTube has gotten a drum-memory system from the 1950s nearly fully-functional again.