n. A set of characters in which each character is represented by 2 bytes. Languages such as Japanese, Chinese, and Korean, which contain more symbols than can be represented by 256 code points, require double-byte character sets. Because each character requires 2 bytes, the typing, display, and printing of DBCS characters requires hardware and programs that support DBCS.
A character set that can be used to represent Far Eastern languages that use ideographic characters. Like a multibyte character set (MBCS), a DBCS contains both single- and double-byte characters. DBCS characters are addressed using two bytes. The DBCS single-byte characters conform to the 8-bit national standards for each country and correspond closely to the ASCII character set. See also lead byte, trail byte, Unicode.