In telecommunication, the term cancel character
has the following meanings:
A control character ("CAN", Unicode, or caret notation) used to indicate that the data with which it is associated are in error or are to be disregarded.
A control character ("CCH", Unicode) used to erase the previous character. This character was created as an unambiguous alternative to the much more common backspace character ("BS", Unicode), which has a now mostly obsolete alternative function of causing the following character to be superimposed on the preceding one.