ASCII Characters for MPE Users The ASCII character set defines 128 characters (0 to 127 decimal, 0 to 7F hexadecimal, and 0 to 177 octal). This character set is a subset of many other character sets with 256 characters, including the ANSI character set of MS Windows, the Roman-8 character set of HP systems, and the IBM PC Extended Character Set of DOS, and the ISO Latin-1 character set used by Web
