To make things worse, the four eras – typewriters, teletypes, word processors, and early computers – meandered, overlapped, and stole from one another. Some early computers used electric typewriters for input and output. Later ones used teletypes. Still others came with completely custom keyboards. Word processors were all over the place as well: some were nothing more than typewriters with extra machinery and keys bolted on to the side, while others were completely custom-made machines.

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This is always the tricky part talking about keyboard history. There was no day, no single event when Return became Enter. We’re stuck in a universe where some people use Enter to enter data and Return to return the cursor to the next line – and others do the exact opposite.