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(Greek letters tai epsion chi) A typesetting language developed by Stanford professor Donald Knuth that is noted for its ability to describe elaborate scientific formulas. Pronounced "tek," TeX is widely used for mathematical book publishing throughout the world.

Knuth created the first prototype of TeX in 1978 to avoid having to continue using the Unix troff program to typeset his book series, "The Art of Computer Programming." It took eight years of writing and revising to complete the language. Available for DOS, Windows, Mac, Unix, Linux and other platforms, visit the TeX User Group at for more information. See LaTeX.


(LAmport TeX) A document preparation system based on the TeX language developed by Leslie Lamport at SRI International. LaTeX provides a macro language for TeX that lets the user concentrate on the logical structure of the document rather than the format codes. See TeX.

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