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In computing, there has been ambiguity between the backspace key and delete key.
Furthermore, this is an actual delete key, not a historically named backspace.
Even if a terminal did interpret backspace by deleting the preceding character, the system receiving the text might not.
The space bar, dash/underscore, index, backspace and line feed repeated when continually held down.
Many typewriters don't advance accent characters, so that no backspace is needed.