A2

A2, A02, A002, A², A.II or A-2 may refer to:

Biology and medicine

Genes and proteins

A-box 2 of insulin gene

HLA-A2, a human MHC HLA-A serotype gene

Ectodysplasin A2 receptor, a protein that in humans is encoded by the EDA2R gene

Alpha-2 adrenergic receptor

Annexin A2, a protein

Apolipoprotein A-II, a protein

Phospholipase A2, an enzyme

Prokaryotic phospholipase A2, an enzyme

Hemoglobin A2, a protein

Proanthocyanidin A2, an A type proanthocyanidin

Urea transporter A2, a protein

A2, a variant of blood groups alleles A in the ABO blood group system

A2, a subfamily of rhodopsin-like receptors

Medicine

ATC code A02 Drugs for acid related disorders, a subgroup of the Anatomical Therapeutic Chemical Classification System

Brachydactyly type A2, a disease

Noradrenergic cell group A2

Other uses in biology and medicine

British NVC community A2 (Lemna minor community), a plant community

A2, the second anal vein in the Comstock-Needham system of insect wing segment naming

Computing

A-2 (programming language), a follow-on to the A-0 System used on UNIVAC I

A2 (operating system), software to run a computer

Electronics

DiMAGE A2, a digital camera produced by Minolta

IBM A2, an IBM processor used in its supercomputers

Cowon A2, a portable multimedia player from Cowon

Gaming

A2 Secret of the Slavers Stockade, a module in the Scourge of the Slave Lords series for Dungeons & Dragons

Final Fantasy Tactics A2: Grimoire of the Rift

Language

Biu-Mandara A.2 languages, an Afro-Asiatic family of languages spoken in Nigeria

A2, a second language level in the IB Group 2 subjects

A2, a level in the Common European Framework of Reference for Languages

Military

A-2 jacket, a leather flight jacket

A2, the military staff designation in the continental staff system for air force headquarters staff concerned with intelligence and security

A 2, Göta Artillery Regiment designation, a former Swedish Army artillery regiment

Music

A due, a musical term often abbreviated to a2

A2, a rock band that performed the song "Chosen One" in the video game Shadow the Hedgehog

Sport

A2 (classification), an amputee sport classification

HEBA A2, a Greek basketball league

A2 volleyball league (Portugal)

A2, an Italian Baseball League

A2, an Italian Volleyball League

A2, a grade in climbing

Television

A2 (remote television production), a person who manages audio equipment

A2 Stereo or Zweikanalton, a television broadcasting system

"A2 Teema", a panel discussion episode of Ajankohtainen kakkonen, a Finnish television series

Antenne 2, former name (1975–1992) of French national television station France 2, commonly abbreviated "A2"

Transportation

Air

A-2 Savage or AJ Savage, an aircraft

Abrial A-2 Vautour, a French sailplane built in 1925

Antonov A-2, a Soviet glider

Breda A.2, a 1921 Italian aircraft

Fokker A.II, a German aircraft

Nikol A-2, 1939 a prototype of a Polish amphibious flying boat

Pfalz A.II, a German Idflieg A-class designation aircraft

Reaction Engines A2, a design study for a hypersonic airliner under development

Cielos Airlines's IATA code

North American AJ Savage carrier-launched bomber (US Navy alphanumeric code "A-2")

A2, a Botswana aircraft registration code

Rail

A2-class Melbourne tram

Bavarian A II, an 1847 German steam locomotive model

Ceylon Government Railway A2, a class of steam locomotives

LNER Class A2, a class of steam locomotives

LNER Peppercorn Class A2, a class of steam locomotives

LNER Thompson Class A2, 3 classes of Pacific locomotives

Milwaukee Road class A2, a 1901 4-4-2 type steam locomotive

SP&S Class A2, an 1887 steam locomotives class

Victorian Railways A2 class, a 1907 Australian steam locomotive

PRR A2, a Pennsylvania Railroad locomotive classification

Prussian A 2, a Prussian railbus model

Road

List of A2 roads

Anadol A2, a 1970 Turkish car

Arrows A2, a 1979 British racing car

Audi A2, a 1999 automobile

Merzario A2; see template:F1 cars 1979

Route A2 (WMATA), a bus route operated by the Washington Metropolitan Area Transit Authority

Audi Quattro A2, a 1984 rally car evolution of the Audi Quattro

Sea

HMS A2, a Royal Navy A-class submarine

Type A2 submarine, a submarine of the Imperial Japanese Navy during World War II

T2-SE-A2, a type of oil tanker constructed and produced in large quantities in the US during World War II

Sea Area A2, as defined under the GMDSS system

Space

Saturn A-2, a 1959 American rocket

A-002, the third abort test of the Apollo spacecraft

Aussat (Optus) A2, a 1985 Australian satellite

Tanks

M1A2, a version of the American M1 Abrams tank

M60A2, a version of the American M60 Patton tank

Weapons

A2 (rocket), a German rocket design (1934)

AUG A2 Commando, a variant of the Austrian Steyr AUG rifle

M16A2 rifle, a variant of the M16 rifle of the US Army

AR-15A2, a variant of the Colt AR-15 rifle

M16A2 mine, a variant of the M16 mine of the US Army

Polaris A-2, a variant of the Polaris missile of the US Navy

Other uses

A2 (theater), a person who manages audio equipment

DIN4102 A2, a flammability rating for materials ~98% noncombustible

A2-level, an education qualification in England, Wales and Northern Ireland

A2 milk, a trademark of the A2 Corporation

Radio Station A2, a radio station in Lithuania

A-2 tool steel, an air-hardening SAE grade of tool steel

A-2 visa, a document given to officials representing a foreign government inside the US

Agence de l'innovation industrielle (AII), a French governmental agency for technological projects

Ann Arbor, Michigan, often referred to as A2 or A2

Bird's Opening's Encyclopaedia of Chess Openings code

A2, an international standard paper size

A2 or SAE 304, a grade of stainless steel for fasteners

A2, a UK Town and Country Planning use class

A II, a painting by László Moholy-Nagy, painted in 1924

Sea Area A2, a GMDSS system area

YoRHa Type A No.