A11

A11, A 11 or A-11 is a three-letter acronym that may refer to:

Military

* A11, a German rocket design in World War II that was never constructed: see Aggregate series#A11
* A-11 watch, an aviators' wristwatch used in World War II
* Aero A.11, a Czech bomber built prior to World War II
* Antonov A-11, an glider
* Consolidated A-11, an attack version of the 1930s Consolidated P-30 fighter aircraft
* HMS "A11", a British A class submarine of the Royal Navy
* Matilda Mk I, a British infantry tank
* F-117 Nighthawk, as an informal name for the stealth aircraft
* A-11, an inaccurate reference, by President Lyndon Johnson to the, yet unnamed, Lockheed YF-12. In a speech given in the early sixties, Johnson, reading from a prepared script, misread All Weather Interceptor as A 11 Weather Interceptor.
* a Swedish regiment, according to the list of Swedish artillery regiments

Other

* ATC code A11, a division of the Anatomical Therapeutic Chemical Classification System
* Chery A11, a 1999 Chinese car
* HLA-A11, an HLA-A serotype
* One of the Encyclopaedia of Chess Openings codes for the English Opening in chess
* A-11 offense, an American Football shotgun formation involving 2 quarterbacks and 9 other potentially eligible receivers

Roads

; highways :
* A11 (Croatia), a highway connecting Zagreb to Sisak
* A11 expressway (Switzerland), a highway in Switzerland
* A11 highway (Lithuania); motorways :
* A11 autoroute, a French motorway connecting Pars to Nantes
* A11 motorway (Portugal); roads :
* A11 road (England), connecting London to Norwich
* A011, National Route A011 (Argentina)
* a national road in Latvia