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Meaning of input/output

in•put/out•put

Pronunciation: (in'poot"out'poot"), [key]
— Computers. Computers.n.
  1. 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.
—adj.
  1. pertaining to input or output:I/O Early input/output devices were slow. Abbr.:
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.