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In telecommunication, the term cancel character has the following meanings:
- A control character ("CAN", "Cancel", U+0018, or
^X) used to indicate that the data with which it is associated are in error or are to be disregarded. Exact meaning can depend on protocol. In journalistic text transmission, for instance, it signifies that the preceding word should be deleted; it is sometimes called "Kill Word" ("KW") in this context.
- A control character ("CCH", "Cancel Character", U+0094, or
ESC T) used to erase the previous character. This character was created as an unambiguous alternative to the much more common backspace character ("BS", U+0008), which has a now mostly obsolete alternative function of causing the following character to be superimposed on the preceding one.