vertical instruction

vertical instruction

[′vərd·ə·kəl in′strək·shən]
(computer science)
An instruction in machine language to carry out a single operation or a time-ordered series of a fixed number and type of operation on a single set of operands.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The mechanism supports both horizontal and vertical instructions (allowing it to show 4:3 material on a 16:9 display).
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