https://aresluna.org/the-day-return-became-enter/
However, zipping the carriage from the right side of the page to the left was slower. That created a challenge: since teletypes communicated at a constant rate, the first letter arriving after a longer line could be smeared across the page, as the carriage return was still in progress.
Just as with early typewriters, any “smart” solution would be prohibitively complicated or expensive to make. But what if the character following a carriage return was guaranteed to be non-printing? This would give the teletype a chance to catch up. And so teletypes undid the early convenience of typewriters, and Carriage Return became decoupled from Line Feed. The former key moved the carriage to the left, but stayed on the same line. The latter advanced the paper to the next line, with no horizontal movement.
With forms came a challenge rather similar to what word processors encountered: There was a difference between returning to a new line within a form field, and the act of submitting – entering – the entire form.
Enter Enter.
