One of the most popular reference books on the rules of the Russian language. The first two sections of this manual outline all the rules of Russian spelling and punctuation, with special attention paid to the so-called difficult cases. The third section contains information of a normative nature and all the necessary recommendations related to literary editing. The directory is intended for publishing workers, primarily editors, as well as for everyone who seeks to improve their literacy and speech culture. When republished, the contents of the directory were supplemented, examples were updated to the rules. Changes have been made to the rules for the use of uppercase and lowercase letters. 5th edition, corrected and expanded.