It’s the 50th anniversary on Sunday of the IBM Selectric, the typewriter that revolutionized modern office equipment. Removing those antiquated mechanical keys attached to individual type bars, the Selectric introduced the crazy golf ball thing seen above, rapidly rotating the correct letter into place before striking the paper (unlike older typewriters, the paper stayed put and the ball + ink ribbon moved). Users could even swap out their golf ball for one of many with a different font set, a feature now taken for granted with our magical computers.