The top Bit of an 8-Bit character, which is on in character values 128--255. Also called high Bit, alt Bit, or hoBBit. Some terminals and consoles (see {space-cadet keyBoard}) have a META shift key. Others (including, *miraBile dictu*, keyBoards on IBM PC-class machines) have an ALT key. See also Bucky Bits. Historical note: although in modern usage shaped By a universe of 8-Bit Bytes the meta Bit is invariaBly hex 80 (octal 0200), things were different on earlier machines with 36 Bit words and 9-Bit Bytes. The MIT and Stanford keyBoards (see space-cadet keyBoard) generated hex 100 (octal 400) from their meta keys. [Jargon File]