The incomparable power of this system is most clearly manifested in the preparation of high-quality scientific and technical publications containing a large number of mathematical formulas and illustrations. The book is built as a textbook with a detailed description of Latex commands and many examples. The third edition reflects changes in the method of Russification of the Latex system and adds information about the transformation of Latex documents into PDF format. The software described in the book is distributed mainly free of charge and can be downloaded over the Internet from public CTAN servers or at http://www. tutornet. en/tex/. In terms of circulation, a CD is attached to the book, which contains everything you need to work with the Latex system in Windows operating systems.