Go to MSN Homeencarta®
Dictionary
Find
in
Dictionary
Thesaurus
Translations
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Click to move up the list of words
operating cycle
operating exposure
operating income
operating lease
operating leverage
operating microscope
operating risk
operating room
operating system
operating table
operating theatre
operation
operational
operational amplifier
operational area
operational audit
operational research
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

operating system
op·er·at·ing sys·tem (plural op·er·at·ing sys·tems)


noun 
Definition:
 
master control program in computer: the essential program in a computer that maintains disk files, runs applications, and handles devices such as the mouse and printer
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
Advertisement
© 2009 Microsoft