bit zone

bit zone

[′bit ‚zōn]
(computer science)
One of the two left-most bits in a commonly used system in which six bits are used for each character; related to overpunch.
Any bit in a group of bit positions that are used to indicate a specific class of items; for example, numbers, letters, special signs, and commands.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.