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===Teleprinter=== {{Main|Teleprinter#Teleprinters in computing}} A ''teleprinter'' or ''teletypewriter'' (TTY) is a type of printer that is meant for sending and receiving messages. Before displays were used to display data visually, early computers would only have a teleprinter for use to access the [[system console]]. As the operator would enter commands into its keyboard, the teleprinter would output the results onto a piece of paper. The teleprinter would ultimately be succeeded by a [[computer terminal]], which had a display instead of a printer.
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