as an "explicit space". It was used in BCDIC, EBCDIC, and ASCII-1963. See also Carriage return Em (typography) En (typography) Form feed Indent style Line feed Newline Programming style Prosigns for Morse code Regular expression#Character classes for the white-space character class. Space bar Space (punctuation) Tab key Trimming (computer programming) Whitespace (programming language) Zero-width space References External links Property List of Unicode Character Database Character encoding Source code Whitespace