[video game] XOR is a computer puzzle game created by Astral Software and published by Logotron in 1987 for a range of platforms including the Acorn Electron, Amiga, Amstrad CPC, Atari ST, BBC Micro, Commodore 64, and ZX Spectrum. It has since been unofficially remade for platforms including Windows, Apple Macintosh, Linux, RISC OS, the SAM...
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http://en.wikipedia.org/wiki/XOR_(video_game)

The exclusive-or function; given two Boolean inputs, the output of XOR is 1 if and only if the two inputs are different; otherwise, the output is 0.
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Exclusive OR (Also EOR)
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hacker
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http://www.noslang.com/dictionary/x/

XOR is an abbreviation for Exclusive Or
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synonym for ^, the bitwise exclusive or operator TC++PL C.3.1.
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http://www.stroustrup.com/glossary.html
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