The History of the "Undo" Function?
TheLocustNMI asks: "So, earlier today as I was typing out some magnum opus of a stored procedure, I highlighted to copy it, and hit SPACE instead of Ctrl-C. Without thinking, I hit Ctrl-Z to 'undo' my folly. Pausing a moment to reflect, I realized that I own countless hours of thanks to whomever came up with the "undo" button. In short -- my question is this -- where did it come from? What are the earliest implementations of the 'undo'? (a quick googling returns this page, a cornucopia of undo and history related treatises)"
And the second "undo" button was the penknife, which you could use to scrape off the white-out that you applied by accident.
"Can of worms? The can is open... the worms are everywhere."
.. or do you find yourself saying "Control-Z" in your mind whenever you find yourself making mistakes while not sitting in front of a computer..spilling a glass of milk...etc