AJ

AJ may refer to:

Products, brands, tools

• Aj Daily, a newspaper
• AJ Savage, a United States Navy aircraft built by North American Aviation
• Adjustable spanner
• An inbred strain of mouse

Places

• Apache Junction, Arizona
• Azerbaijan (World Meteorological Organization country code and obsolete NATO country code)

Groups, businesses, and publications

• Aaj (newspaper), an Indian newspaper
• Al-Jihad, an Egyptian Islamist group
• The Astronomical Journal

Biology

• Adherens junction, cell-cell junctions between neighboring cells

aJ

• atto-joule, an International System of Units unit of energy equal to 10⁻¹⁸ joules

People

• AJ Alexander, an American model and Playboy Playmate
• A. J. Balaban, (1889–1962), co-founder of Balaban and Katz
• A. J. Allmendinger, an American race car driver
• A. J. Burnett, an American Major League Baseball pitcher for the New York Yankees
• A. J. Calloway, an American television personality
• A. J. Cook (actress), a Canadian actress
• A. J. Croce, an American singer and songwriter
• A. J. Cronin, Scottish novelist
• A. J. Foyt, an American race car driver
• A. J. Hawk, an American football linebacker for the Green Bay Packers
• Adrienne Janic, an American actress and television host
• Lee Gi Kwang "AJ", Korean entertainer
• AJ Michalka, American actress and musician
• A. J. McLean, an American singer and member of the band Backstreet Boys
• A. J. Pierzynski a Major League Baseball catcher for the Chicago White Sox
• A. J. Price, NBA basketball player
• A. J. Raffles, protagonist in many of the works of Ernest William Hornung
• A.J. Styles, ring name for Allen Jones, an American professional wrestler
• A. J. Weberman a garbologist, Dylanologist, Yippie and CIA historian
• AJ Lee, ring name for April Jeanette Mendez, an American female professional wrestler
• A. J. (The Fairly OddParents), a character in the cartoon The Fairly OddParents
• Applejack (My Little Pony), a character in the My Little Pony franchise whose nickname is AJ (an acronym)