Yes, AMS-TeX is a TeX macro set developed on the basis of Plain TeX provided by American Mathematical Society. Mainly used for typesetting scientific articles or books containing many mathematical symbols and formulas. AMS-TeX gives many advanced commands to facilitate users to typeset large and complex mathematical formulas. The function of AMS-TeX typesetting mathematical formula is realized in LaTeX through the macro package amsmath in AMS-LaTeX. The current version of AMS-TeX is 2. 1. AMS-LaTeX consists of two parts. One is the amsmath macro package mentioned above, which is mainly used for typesetting mathematical symbols and formulas. The other part is amscls, which provides the format of papers and books required by the American Mathematical Society. The current version of AMS-LATEX is 2.0. The American Mathematical Society provides AMS-TEX and AMS-LaTeX as well as a set of fonts for mathematical symbols, AMSFonts. This font adds many mathematical symbols, bold mathematical symbols and so on. This is not available in the modern TEX standard font computer. The current version of AMSFonts is 2.2. Metafont and Type 1 fonts can be downloaded.