operation register
Also found in: Acronyms.
operation register
[‚äp·ə′rā·shən ‚rej·ə·stər] (computer science)
A register used to store and decode the operation code for the next instruction to be carried out by a computer.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.