A5 and variants may refer to:

Science and mathematics

A5 regulatory sequence Transcription of insulin is regulated by the binding of various transcription factors to the ~400 base pairs before the insulin transcription start site, called the "insulin regulatory sequence". This sequence is made up of several distinct regions ...

in biochemistry * A5, the abbreviation for the

androgen An androgen (from Greek ''andr-'', the stem of the word meaning "man") is any natural or synthetic steroid hormone that regulates the development and maintenance of male characteristics in vertebrates by binding to androgen receptors. This in ...

Androstenediol *

Annexin A5 Annexin A5 (or annexin V) is a cellular protein in the annexin group. In flow cytometry, annexin V is commonly used to detect apoptotic cells by its ability to bind to phosphatidylserine, a marker of apoptosis when it is on the outer leaflet of ...

, a human cellular protein * ATC code A05 ''Bile and liver therapy'', a subgroup of the Anatomical Therapeutic Chemical Classification System * British NVC community A5 (Ceratophyllum demersum community), a British Isles plants community * Subfamily A5, a Rhodopsin-like receptors subfamily * Noradrenergic cell group A5, a noradrenergic cell group located in the

Pons The pons (from Latin , "bridge") is part of the brainstem that in humans and other bipeds lies inferior to the midbrain, superior to the medulla oblongata and anterior to the cerebellum. The pons is also called the pons Varolii ("bridge of Va ...

* A5 pod, a name given to a group of orcas (Orcinus orca) found off the coast of British Columbia, Canada * A5, the strain at fracture of a material as measured with a load test on a cylindrical body of length 5 times its diameter * ''A''₅, the

alternating group In mathematics, an alternating group is the group of even permutations of a finite set. The alternating group on a set of elements is called the alternating group of degree , or the alternating group on letters and denoted by or Basic pr ...

on five elements

Technology

Apple A5 The Apple A5 is a 32-bit system on a chip (SoC) designed by Apple Inc. and manufactured by Samsung. The first product Apple featured an A5 in was the iPad 2. Apple claimed during their media event on March 2, 2011 that the ARM Cortex-A9 centra ...

, the Apple mobile microprocessor *

ARM Cortex-A5 The ARM Cortex-A5 is a 32-bit processor core licensed by ARM Holdings implementing the ARMv7-A architecture announced in 2009. Overview The Cortex-A5 is intended to replace the ARM9 and ARM11 cores for use in low-end devices. The Cortex-A5 offe ...

, ARM applications processor

Sport and recreation

A5 (classification) A5 is an amputee sport classification used by the International Sports Organization for the Disabled (ISOD).for people with acquired or congenital amputations. A5 sportspeople are people who have both arms amputated above or through the elbow join ...

, an amputee sport classification * A5 grade (climbing) * A5, an aid climbing gear manufacturer - absorbed by The North Face * A05,

Réti Opening The Réti Opening is a hypermodern chess opening whose "traditional" or "classic method" begins with the moves: :1. Nf3 d5 :2. c4 White attacks Black's pawn from the , which may occasion 2...dxc4. White may couple this plan with a kingside ...

Encyclopaedia of Chess Openings code * A-5, a common shorthand name for the

Browning Auto-5 The Browning Automatic 5, most often Auto-5 or simply A-5, is a recoil-operated semi-automatic shotgun designed by John Browning. It was the first successful semi-automatic shotgun design, and remained in production until 1998. The name of the s ...

shotgun *

Gibson A-5 mandolin Gibson may refer to: People * Gibson (surname) Businesses * Gibson Brands, Gibson Brands, Inc., an American manufacturer of guitars, other musical instruments, and audio equipment * Gibson Technology, and English automotive and motorsport compan ...

, a Gibson mandolin *

Tippmann A-5 The A-5 is a semi-automatic pneumatic marker made by Tippmann for playing paintball. It is inspired by the look and feel of the Heckler & Koch MP5K The Heckler & Koch MP5 (german: Maschinenpistole 5) is a 9x19mm Parabellum submachine gun, ...

, a semi-automatic pneumatic marker for playing paintball * A5, an Atlanta-based volleyball club

Transport

Automobiles

Arrows A5 The Arrows A5 was the car which the Arrows Formula One team used to compete in the 1982 Formula One season. The A5 appeared late in the season, and was primarily a development car, with the lessons learned to be applied to the A6 for the upcomin ...

, a 1982 British Formula One racing car *

Audi A5 The Audi A5 is a series of compact executive coupe cars produced by the German automobile manufacturer Audi since June 2007. The A5 range additionally comprises the coupe, cabriolet, and "Sportback" (a five-door liftback with a fastback roofline) ...

, a 2007–present German compact executive car *

Chery A5 The Chery A5 is a compact car produced by the Chinese manufacturer Chery from 2006 to 2010. This car heavily resembles the third-generation Nissan Altima, despite being unrelated. A facelifted variant of the A5 called the Cowin 3 was produced fr ...

, a 2006–2010 Chinese compact sedan *

Soueast A5 The Soueast A5 Yiwu (翼舞) is a compact sedan produced by Chinese manufacturer Soueast Motors since 2018 to replace the Soueast V5 Lingzhi. Overview The A5 Yiwu was first launched during the 2018 Chengdu Auto Show in August 2018, with the pr ...

, a 2019–present Chinese compact sedan * JAC Refine A5, a 2019–present Chinese compact sedan

Other uses in transportation

A5 road A5 Road may refer to: ;Africa * A5 highway (Nigeria), a road connecting Lagos and Ibadan * A5 road (Zimbabwe), a road connecting Harare and Francistown ;Americas * Quebec Autoroute 5, a road in Quebec, Canada * County Route A5 (California) or B ...

, in several countries *

Hall-Scott A-5 Hall-Scott Motor Car Company was an American manufacturing company based in Berkeley, California. It was among the most significant builders of water-cooled aircraft engines before World War I. History 1910–21 The company was founded in 1910 ...

, an engine powering the 1916

Standard H-2 The Standard H-2 was an early American Army reconnaissance aircraft, ordered in 1916. The H-2 was built by the Standard Aircraft Corporation, and previously known as the Sloane H-2. It was an open-cockpit three-place tractor biplane, powered by ...

aircraft *

Prussian A 5 Prussia, , Old Prussian: ''Prūsa'' or ''Prūsija'' was a German state on the southeast coast of the Baltic Sea. It formed the German Empire under Prussian rule when it united the German states in 1871. It was ''de facto'' dissolved by an em ...

, a 1913 German railbus * Route A5 (WMATA), a bus route operated by the Washington Metropolitan Area Transit Authority *

Airlinair Société Airlinair, simply known as Airlinair, was a French regional airline based in Rungis, France, operating scheduled regional flights (some of which were on behalf of Air France), and aircraft lease services. The airline has set up bases ...

, by IATA code *

Bhutan Bhutan (; dz, འབྲུག་ཡུལ་, Druk Yul ), officially the Kingdom of Bhutan,), is a landlocked country in South Asia. It is situated in the Eastern Himalayas, between China in the north and India in the south. A mountainou ...

, by aircraft registration code * ICON A5, an American amphibious aircraft * Pennsylvania Railroad class A5s, an American locomotive * Finnish Steam Locomotive Class A5

Military

Aircraft

* ''A-5'', an export version of Nanchang Q-5, a Chinese-built jet fighter bomber *

Curtiss Falcon The Curtiss Falcon was a family of military biplane aircraft built by the American aircraft manufacturer Curtiss Aeroplane and Motor Company during the 1920s. Most saw service as part of the United States Army Air Corps as observation aircraft ...

or A-5 Falcon, an attack aircraft manufactured by the Curtiss Aircraft Company *

Mitsubishi A5M The Mitsubishi A5M, formal Japanese Navy designation , experimental Navy designation Mitsubishi Navy Experimental 9-''Shi'' Carrier Fighter, company designation Mitsubishi ''Ka''-14, was a Japanese carrier-based fighter aircraft. It was the world ...

, a 1930s Japanese fighter plane *

A-5 Vigilante The North American A-5 Vigilante was an American carrier-based supersonic bomber designed and built by North American Aviation (NAA) for the United States Navy. Prior to 1962 unification of Navy and Air Force designations, it was designated t ...

, a carrier-based supersonic bomber designed for the United States Navy * Focke-Wulf A 5, a World War I German

Focke-Wulf aircraft Focke-Wulf Flugzeugbau AG () was a German manufacturer of civil and military aircraft before and during World War II. Many of the company's successful fighter aircraft designs were slight modifications of the Focke-Wulf Fw 190. It is one of the p ...

Sturzkampfgeschwader 1 ''Sturzkampfgeschwader'' 1 (StG 1 - Dive Bomber Wing 1) was a Luftwaffe dive bomber wing during World War II. StG 1 was formed in May 1939 and remained active until October 1943, when it was renamed and reorganised into Schlachtgeschwader ...

, from its historic ''Geschwaderkennung'' code with the

Luftwaffe The ''Luftwaffe'' () was the aerial-warfare branch of the German ''Wehrmacht'' before and during World War II. Germany's military air arms during World War I, the ''Luftstreitkräfte'' of the Imperial Army and the '' Marine-Fliegerabtei ...

in World War II

Other uses in military

* or USS ''Pike'' (SS-6), a 1903 United States Navy ''Plunger''-class submarine * , an A-class submarine of the Royal Navy * Aggregate 5, a German rocket design, scaled down precursor to the V-2, in World War II * A 5, a Swedish regiment designation, see list of Swedish artillery regiments * A5, the staff designation for air force headquarters staff concerned with plans or strategy ** In the United Kingdom, the

Joint Force Air Component Headquarters The Joint Force Air Component Headquarters (JFACHQ) is the United Kingdom's deployable air command and control unit. The JFACHQ is run by the Royal Air Force with representation from the other services. The JFACHQ has members from the operatio ...

A5 - Air Strategy and GAT branch * A5 Juggernaut, an armored fighting vehicle in the Star Wars fictional universe

Other uses

A5 paper size ISO 216 is an international standard for paper sizes, used around the world except in North America and parts of Latin America. The standard defines the "A", "B" and "C" series of paper sizes, including A4, the most commonly available paper size ...

, an ISO 216 international standard paper size (148 × 210 mm) * A5, the highest grade of Japanese

wagyu Wagyu ( ja, 和牛, Hepburn: ''wagyū'', ) is the collective name for the four principal Japanese breeds of beef cattle. All wagyū cattle derive from cross-breeding in the early twentieth century of native Japanese cattle with imported sto ...

beef * In Town and country planning in the United Kingdom, A5 is the code for permission to use specific land or premises for takeaways