Character set
The characters (and their byte codes) available in an application program. The most common is the ASCII (or ANSI) set of 128 characters, in which CAPITAL LETTER A has the code 41 in hexadecimal, 065 decimal, and 01000001 binary. Various localized character sets are ISO 8859-1 or Latin-1, the most common encoding of characters for Western European languages. ISO 8859-1 through 8859-15 are 256 character sets. The first 128 characters are the same as ASCII, and the upper 128 encode Cyrillic, Hebrew, Arabic, etc. characters.