A "mainframe" originally meant the cabinet containing the [[CPU|central processor unit]] of a very large [[computer]].
After minicomputers became available, the word mainframe came to refer to the large computer itself.
The older computers used many large vacuum tubes and generated a lot of heat, thus requiring specially air-conditioned rooms.
A single [[computer]] might have hundreds of users at a time.
Today, because the large vacuum tubes have given way to transistors, a desktop personal computer can have as much poweras a mainframe computer that once filled a whole room.
Mainframes in use now often have smaller [[computer|computers]] as front end processors.
[[Category:Computer]]
[[Category:Definitions]]
Latest revision as of 06:25, 12 November 2007
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