Which goes all the way back to the beginning: Englebart's NLS, which had a mouse on the right and a chord set on the left of the keyboard. (Go watch The Mother

Which goes all the way back to the beginning: Englebart's NLS, which had a mouse on the right and a chord set on the left of the keyboard. (Go watch The Mother of All Demos if you've forgotten; I'll wait.) The Xerox Alto borrowed the chord/mouse pair; then the Xerox Star team found the chord set too hard for normal people to learn, and substituted dedicated function keys on the left of the keyboard, still designed to be paired with the mouse. (Incidentally, while we're talking editors, Star had a MOVE key instead of CUT and PASTE, because it was a user interface principle that there be no hidden state.)