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What is TeX

TeX is a typesetting language. Instead of visually formatting your text, you type your manuscript text combined with commands in a plain text file. You then run TeX to produce the final layout. Thus, in contrast to standard word processors, the source (TeX commands) is a separate file that does not pretend to be a representation of the final typeset document, and thus can be edited by any text editor. For example, \mathrm{e}^{i\pi}=-1 gives Mathematical equation whereas

\mathrm{H}_{2}\mathrm{CO}_{3}\stackrel{\mathrm{heat}}{\longrightarrow}\mathrm{H}_{2}\mathrm{O}+\mathrm{CO}_{2}

gives after processing Chemical equation.

Here are some links that we hope will help with further background:

The Pointers to Frequently Asked Questions document provides a brief general overview of the TeX system.

The Wikipedia encyclopedia article on TeX provides a somewhat more detailed overview.

The complete page from which this topic is inspired.