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Something put into a system or expended in its operation to achieve output or a result, especially:
(noun)
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Energy, work, or power used to drive a machine.
(noun)
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Current, electromotive force, or power supplied to an electric circuit, network, or device.
(noun)
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Computer Science Information put into a communications system for transmission or into a computer system for processing.
(noun)
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Computer Science A position, terminal, or station at which input enters a system.
(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.