(abbreviated in writing as CMOS, TCM, or CMS, or sometimes as Chicago) a style guide for American English published since 1906 by the University of Chicago Press.

AMA Manual of Style: A Guide for Authors and Editors is the style guide of the American Medical Association.

The Microsoft Manual of Style: Your Everyday Guide to Usage, Terminology, and Style for Professional Technical Communications, in former editions the Microsoft Manual of Style for Technical Publications, was a style guide published by Microsoft.

The New York Times Manual of Style and Usage: The Official Style Guide Used by the Writers and Editors of the World's Most Authoritative Newspaper is a style guide first published in 1950 by editors at the newspaper and revised in 1974, 1999, and 2002 by Allan M. Siegal and William G. Connolly.