. 1-byte character sets are used for letters, digits and control characters. Often double-byte character sets are constructed in such a way that they can interpret the characters from a 1-byte character set. The best-known 1-byte character set is the ASCII
Character sets whose characters consist of two bytes are called double-byte character sets (DBCS) and whose characters consist of two or more bytes are called multibyte character sets (MBCS).