A11

A11, A 11 or A-11 may refer to:

Military

Aero A.11, a Czechoslovakian bomber produced before World War II
Consolidated A-11, an attack version of the Consolidated P-30 fighter plane of the 1930s
HMS A11, an A-class submarine of the Royal Navy
Matilda Mk I, a British Army infantry tank
Aggregate 11, a proposed military rocket of Nazi Germany
A-11 Ghibli, the Italian designation for the AMX International AMX

A11 road, in several countries
Apollo 11
A-11 offense, an American Football shotgun formation involving 2 quarterbacks and 9 other potentially eligible receivers
Arrows A11, a 1989 British racing car
ATC code A11 Vitamins, a subgroup of the Anatomical Therapeutic Chemical Classification System
British NVC community A11 (Potamogeton pectinatus - Myriophyllum spicatum community), a British Isles plant community
Chery A11, a 1999 Chinese car
HLA-A11, an HLA-A serotype
American Airlines Flight 11, a plane that was hijacked and crashed into the World Trade Center in the September 11 attacks
English Opening, Encyclopaedia of Chess Openings code
Apple A11, an ARM SoC mobile processor designed by Apple
"A-11", a 1963 country song written by Hank Cochran