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. According to the Times Deputy News Editor Philip B. Corbett (in charge of revising the manual) in 2007, the newspaper maintains an updated, intranet version of the manual that is used by NYT staff, but this online version is not available to the general public. An e-book version of this fifth edition was issued in February 2015, and it was released in paperback form in September 2015 (Three Rivers Press, ISBN 978-1101905449).
The New York Times Manual has various differences from the more influential Associated Press Stylebook. As some examples, the NYT Manual: