A finite set of different characters that is complete for a given purpose. Note: A character set may or may not include punctuation marks or other symbols. 2. An ordered set of unique representations. Note: Examples of character sets include the 26 letters of the English alphabet, Boolean characters 0 and 1, the 128 ASCII characters, and International Telegraph Alphabet 5 (ITA-5,) published as CCITT (ITU-T) Recommendation V. 3 and ISO 646.