SYNTAX            : BACKSPACE

FUNCTION          : Erases the character to the left of the cursor in the
                    command input. When line-editing is in insert mode,
                    lines may become joined. In overstrike mode, attempts
                    to BACKSPACE over the beginning of a command-line
                    will fail.

NOTE              : Overstrike and Insert mode for command-line editing
                    have nothing to do with overstrike and insert as
                    alternatives for command mode, although they are
                    quite similar in use.

MATRIX