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 UNIX

A family of multi-user operating systems, first developed by AT&T Bell Laboratories in the...

 UPS

Uninterruptible Power Supply , UPS keeps the server running on a battery for several minutes...

 URL

Uniform Resource Locator , A string that supplies the Internet address of a resource on the World...

 USENET

A world-wide system of discussion groups, with comments passed among hundreds of thousands of...

 UUENCODE

Unix to Unix Encoding , A method for converting files from Binary to ASCII (text) so that they...