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[in-poo t-out-poo t] /ˈɪnˌpʊtˈaʊtˌpʊt/ Computers.
the process of input or output, encompassing the devices, techniques, media, and data used:
A good first step in designing a program is to define the input/output.
pertaining to input or output:
Early input/output devices were slow.
Abbreviation: I/O.
Origin of input/output
1910-15 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for input/output


noun (computing)
the data or information that is passed into or out of a computer I/O
(modifier) concerned with or relating to such passage of data or information
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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input/output in Technology

programming, operating system
(I/O) Communication between a computer and its users, its storage devices, other computers (via a network) or the outside world. The devices the computer uses to do this are called "peripherals". What actually counts as I/O depends on what level of detail you are considering, e.g. communication between processors would not be considered I/O when considering a multiprocessor as a single system.
Important aspects of I/O are throughput, latency, and whether the communications is synchronous or asynchronous (using some kind of buffer).

The Free On-line Dictionary of Computing, © Denis Howe 2010
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