The Associated Press Stylebook and Briefing on Media Law, usually called the AP Stylebook, is a style and usage guide used by newspapers and in the news industry in the United States. The book is updated annually by Associated Press editors, usually in June.

Reporters, editors and others use the AP Stylebook as a guide for grammar, punctuation and principles and practices of reporting. Although some publications use a different style guide, the AP Stylebook is considered a newspaper industry standard and is also used by broadcasters, magazines and public relations firms. It includes an A-to-Z listing of guides to capitalization, abbreviation, spelling, numerals and usage.

Example: If the title of governor is used before a name, it should be capitalized and abbreviated e.g. Gov. Janet Napolitano, but when it's used generically by itself or after the name it should be lowercase and not abbreviated.

The stylebook is organized into sections:

A reference section for reporters covering business and financial news including general knowledge of accounting, bankruptcy, mergers and international bureaus. For instance, it includes explanations of five different chapters of bankruptcy.