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The key was usually labeled "carriage return", "return", or "power return". With typewriters like the Selectric, where the type element moved when typing and the paper was held stationary, the key returned the type element to the far left and the term "carrier return" was sometimes used for this function.
Another is Mathematica, where the Return key creates a new line, while the Enter key (or Shift-Return) submits the current command for execution. Historically, many computer models did not have a separate keypad, and only had one button to function as Enter or Return. For example, the Commodore 64 (manufactured from 1982) had only the "Return ...
An "enter" key may terminate a paragraph of text and advance an editing cursor to the start of the next available line, similar to the "carriage return" key of a typewriter. When the attached system is processing a user command line, pressing "enter" may signal that the command has been completely entered and that the system may now process it.
The purpose of the enter key is to confirm what has been typed. The return key is based on the original line feed/carriage return function of typewriters: in many word processors, for example, the return key ends a paragraph; in a spreadsheet, it completes the current cell and move to the next cell.
The carriage-return lever at the far left was then pressed to the right to return the carriage to its starting position and rotating the platen to advance the paper vertically. A small bell was struck a few characters before the right hand margin was reached to warn the operator to complete the word and then use the carriage-return lever. [41]
carriage return: U+000D: 13 Is a line-break Common: Basic Latin: Other, control CR, Carriage return. ... Symbol for a return key, which enters a line break U+2409: 9225:
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For example, the key labelled "Backspace" typically produces code 8, "Tab" code 9, "Enter" or "Return" code 13 (though some keyboards might produce code 10 for "Enter"). Many keyboards include keys that do not correspond to any ASCII printable or control character, for example cursor control arrows and word processing functions.