input/output

[in-poo t-out-poo t] /ˈɪnˌpʊtˈaʊtˌpʊt/
noun
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.
adjective
2.
pertaining to input or output:
Early input/output devices were slow.
Abbreviation: I/O.
Origin
1910-15
British Dictionary definitions for input-output

input/output

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