i-o

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.

adjective

pertaining to input or output: Early input/output devices were slow. Abbreviation: I/O

Origin:
1910–15

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins

World English Dictionary

input/output

—n
1.	I/O the data or information that is passed into or out of a computer
2.	(modifier) concerned with or relating to such passage of data or information

I/O

—*abbreviation for*
	input/output

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage

Abbreviations & Acronyms

I/O
input/output

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-George Seaton

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i-o

I/O

in·board-out·board

in·put/out·put