A12

A12, A.12 or A-12 may refer to:

Aviation

• A-12 Avenger II, a Cold War–era American aircraft project that was canceled prior to production
• A-12 Shrike, a World War 2–era American attack aircraft
• Abrial A-12 Bagoas, a French experimental glider of the 1930s
• Aero A.12, a Czechoslovak light bomber built after World War I
• Lockheed A-12, codenamed Oxcart, a high-altitude, high-speed reconnaissance aircraft, manufactured for the CIA
• McDonnell Douglas A-12 Avenger II, an early attempt by the United States to develop stealth aircraft, cancelled due to cost overruns and the subject of the Supreme Court case General Dynamics Corp. v. United States involving the state secrets privilege

Military

• Aggregate 12, a German rocket design in World War II that was never constructed
• Brazilian aircraft carrier São Paulo (A12), a French-built aircraft carrier in use by the Brazilian Navy
• HMS A12, a British A-class submarine of the Royal Navy
• Matilda II (tank), built to General Staff specification A12, a British tank of World War 2

Science and technology

• A12 Authentication, a CHAP-based mechanism used by a CDMA2000 Access Network to authenticate a 1xEV-DO Access Terminal
• ARM Cortex-A12, a 32-bit multicore processor
• Apple A12, a 7-nanometer 64-bit ARM SoC
• ATC code A12 Mineral supplements, a subgroup of the Anatomical Therapeutic Chemical Classification System
• British NVC community A12 (Potamogeton pectinatus community), a British Isles plant community
• A Rhodopsin-like receptors subfamily
• Samsung Galaxy A12, an Android phone

Other uses

• A12 road, in several countries
• Fiat A.12, a 1916 Italian, 6–cylinder, liquid-cooled in-line engine
• LSWR A12 class, an 1887 British steam locomotive model
• Route A12 (WMATA), a bus route in Washington, USA
• A12 scale, musical tuning based on the 4:7:10 triad
• One of the Encyclopaedia of Chess Openings codes for the English Opening
• Unite the Right rally, referred to as "A12" locally, a white supremacist rally in Charlottesville, Virginia, which took place on August 12, 2017
• X Æ A-12, the son of Elon Musk
• A highly desirable performance option for the 1969 Plymouth Road Runner and Dodge Super Bee with a 440 engine and special transmission and differential features.