PS: The Preventive Maintenance Monthly, more commonly referred to as PS Magazine, was a series of United States Army pocket-sized bulletins published between June 1951 and November 2019 as a monthly magazine with comic book-style art to illustrate proper preventive maintenance methods, as well as proper supply procedures and related safety.

The Army had experienced some degree of acceptance and success during World War II with the instructional publication Army Motors, for which Corporal Will Eisner, an established comic-book writer-artist-editor, had been appropriated to draw such characters as Beetle Bailey-like Private Joe Dope,[2] Lauren Bacall look-alike and "by the book" Corporal Connie Rodd, and Master Sergeant Half-Mast McCanick.

[3] Eisner left the Army as a chief warrant officer to start American Visuals Corporation, a contract graphic art company.

The magazine's artists have included Eisner, Murphy Anderson, Joe Kubert, Dan Spiegle, Scott Madsen, Malane Newman, Alfredo Alcala, and Mike Ploog.

The continuity consisted of a short story told through the use of a series of panels like any comic book, often with a theme borrowed from popular fiction.

[10] The home office of PS was located at Aberdeen Proving Ground, Maryland, from April 1951 until January 1955, when it was moved to Raritan Arsenal, New Jersey.

Department of the Army pamphlets 750-30 (about the M16 rifle) and 750-31 (about the Gama Goat), as well as numerous posters including 750-78 (about the role of enlisted leadership in preventative maintenance), were also produced in the style of PS, in some cases using the same characters.

Following an increased presence of women in the Army and at the urging of Congresswoman Bella Abzug, as well as Senators William Proxmire and Orrin Hatch, the magazine updated Connie and Bonnie in March 1980 to a more modest and professional form.