blinry - I also learned that the "grep" command is called like that because it performs the same function as running "g/re/p" in the original editor "ed" (and "QED" before that, I think): It gets all lines from a file that match the regular expression "re", and prints them!

And through that same heritage, :g/re/p still works in my Neovim today! ^_^ I love learning stuff like this!~

Based on my research, the earliest computer to use the term "main frame" was the IBM 701 computer (1952), which consisted of boxes called "frames." The 701 system consisted of two power frames, a power distribution frame, an electrostatic storage frame, a drum frame, tape frames, and most importantly a main frame. The IBM 701's main frame is shown in the documentation below.