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mainframes

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main⋅frame

  [meyn-freym]
Use mainframes in a Sentence
–noun Computers.
a large computer, often the hub of a system serving many users.

Origin:
1960–65; main 1 + frame
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Micro Focus COBOL
Web Services, J2EE, XML and .NET Future-proof Business Applications
www.microfocus.com/COBOL
Mainframe Report Writer
Powerful, easy 4GL report writer. Download your free 30-day trial!
www.pacsys.com
main·frame   (mān'frām')   
n.  A large powerful computer, often serving many connected terminals and usually used by large complex organizations.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Cultural Dictionary

mainframe

A large, powerful computer system. A mainframe computer typically carries out complex calculations and is shared by many users. (Compare personal computer.)

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

mainframe 
"central processor of a computer system," 1964, from main (adj.) + frame.
Online Etymology Dictionary, © 2001 Douglas Harper
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