TEX is a computer program created by Donald E. Knuth [2]. It is aimed at typesetting text and mathematical formulae. Knuth started writing the TEX typesetting engine in 1977 to explore the potential of the digital printing equipment that was beginning to infiltrate the publishing industry at that time, especially in the hope that he could reverse the trend of deteriorating typographical quality that he saw affecting his own books and articles. TEX as we use it today was released in 1982, with some slight enhancements added in 1989 to better support 8-bit characters and multiple languages. TEX is renowned for being extremely stable, for running on many different kinds of computers, and for being virtually bug free. The version number of TEX is converging to and is now at .
TEX is pronounced ``Tech,'' with a ``ch'' as in the German word ``Ach''3.1or in the Scottish ``Loch.'' The ``ch'' originates from the Greek alphabet where X is the letter ``ch'' or ``chi''. TEX is also the first syllable of the Greek word texnologia (technology). In an ASCII environment, TEX becomes TeX.