Surely keyboards had a Print Screen button in 1991:
A search to recover the very first web page has unearthed a relic from 1991.
The page turned up after Cern launched a public appeal for files, hardware and software from the web’s earliest days.
The original page is missing because the web’s creators did not preserve the early work they did on what has become a historic document.
Unfortunately, other potential finds from the same era on that old computer remain hidden because the password for it has been forgotten.
…Yes, I’m being obnoxious. I remember when replacing your mouse was a twenty minute exercise in drivers-related frustration; in 1991 I would have looked at you like you were some sort of computer-illiterate lunatic if you had said Just take a screenshot, dude.
I think. Back then only the King Geeks at college were using Windows 3.0. I was an Alpha Geek even then, but not a King.