A5 and variants may refer to:

Science and mathematics

A5 regulatory sequence Transcription (biology), 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 ...

in biochemistry * A5, the abbreviation for the

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

Androstenediol * Annexin A5, 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 Rhodopsin-like receptors are a protein family, family of proteins that comprise the largest group of G protein-coupled receptors. Scope G-protein-coupled receptors, GPCRs, constitute a vast protein family that encompasses a wide range of funct ...

subfamily *

Noradrenergic cell group A5 Noradrenergic cell groups, Noradrenergic cell group A5 is a group of cells in the vicinity of the superior olivary complex in the pontine tegmentum that label for norepinephrine in primates, rodents and other mammals. The noradrenergic A5 pontine ...

, a noradrenergic cell group located in the

Pons The pons (from Latin , "bridge") is part of the brainstem that in humans and other mammals, 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 ...

A5 pod A5 Pod is a name given to a group of orcas (''Orcinus orca'') found off the coast of British Columbia, Canada. It is part of the northern resident orcas population—a name given to the fish-eating orcas found in coastal waters ranging from mid-V ...

, a name given to a group of orcas (Orcinus orca) found off the coast of British Columbia, Canada * A5, the strain at

fracture Fracture is the appearance of a crack or complete separation of an object or material into two or more pieces under the action of stress (mechanics), stress. The fracture of a solid usually occurs due to the development of certain displacemen ...

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 (mathematics), 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 ...

on five elements * Zeolite A-5, a calcium-type

molecular sieve A molecular sieve is a material with pores of uniform size comparable to that of individual molecules, linking the interior of the solid to its exterior. These materials embody the molecular sieve effect, in which molecules larger than the pore ...

also known as 5A.

Technology

Apple A5 The Apple A5 is a 32-bit system on a chip (SoC) designed by Apple Inc., part of the Apple silicon series, 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, 2 ...

, 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 of ...

, ARM applications processor

Sport and recreation

* A5 (classification), an amputee sport classification * A5

grade (climbing) Many climbing routes have grades for the technical difficulty, and in some cases for the risks, of the route. The first ascent, first ascensionist can suggest a grade but it will be amended for the ''consensus view'' of subsequent ascents. W ...

* A5, an aid climbing gear manufacturer - absorbed by

The North Face The North Face is an American outdoor recreation products company. The North Face produces outdoor clothing, footwear, and related equipment. Founded in 1968 to supply climbers, the company's logo draws inspiration from Half Dome, a distinct ...

* 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 fian ...

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 operation, recoil-operated semi-automatic shotgun designed by John Browning and manufactured by Fabrique Nationale de Herstal. It was the first successful semi-automatic shotg ...

shotgun * Gibson A-5 mandolin, a Gibson mandolin *

Tippmann A-5 Tippmann is an American manufacturer of paintball markers and paintball equipment, including military simulation ( MilSim) kits. Tippmann Industrial Products, a related company manufactures manual and pneumatic heavy-duty sewing machines prima ...

, 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 upcom ...

, a 1982 British Formula One racing car *

Audi A5 The Audi A5 is a series of compact executive and grand touring coupé cars produced by the German automobile manufacturer Audi since June 2007. The A5 range also includes the coupe, cabriolet, and "Sportback"—a five-door liftback with a fast ...

, a 2007–present German compact executive car *

Chery A5 The Chery A5 is a mid sized sedan produced by the Chinese manufacturer Chery Chery Automobile Co. Ltd., Doing business as, trading as Chery (), is a Chinese automobile manufacturer owned by Chery Holding Group Co., Ltd. Founded in 1997, it ...

, a 2006–2010 Chinese compact sedan *

Soueast A5 The Soueast A5 Yiwu (翼舞) is a compact Compact as used in politics may refer broadly to a pact or treaty; in more specific cases it may refer to: * Interstate compact, a type of agreement used by U.S. states * Blood compact, an ancient ritual ...

, a 2018–2023 Chinese compact sedan *

Sehol A5 The Sehol A5 ( zh, 江淮嘉悦A5), named the JAC Jiayue A5 until 2021, is a compact car, compact liftback (car), liftback produced by JAC Motors under the Sehol sub brand since 2019. Overview The then-called JAC Jiayue A5 was revealed on 5 Se ...

, a 2019–present Chinese compact sedan, formerly JAC Jiayue A5

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 Bulawayo ;Americas * Quebec Autoroute 5, a road in Quebec, Canada * County Route A5 (California) or Bowm ...

, 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 ...

aircraft * Prussian A 5, a 1913 German

railbus A railbus is a lightweight passenger railcar with an automotive engine. It shares many aspects of its construction with a bus, typically having a bus (original or modified) body and four wheels (2 axles) on a fixed base instead of on bogies. O ...

* 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, officially the Kingdom of Bhutan, is a landlocked country in South Asia, in the Eastern Himalayas between China to the north and northwest and India to the south and southeast. With a population of over 727,145 and a territory of , ...

, by aircraft registration code * ICON A5, an American amphibious aircraft * Pennsylvania Railroad class A5s, an American locomotive * Finnish Steam Locomotive Class A5 * LNER Class A5, a class of 4-6-2T steam locomotives

Military

Aircraft

* ''A-5'', an export version of

Nanchang Q-5 The Nanchang Q-5 (; NATO reporting name: Fan-Tan, Fantan), also known as the A-5 in its export versions, is a 1960s-design Chinese-built single-seat, twin jet engine ground-attack aircraft based on the Shenyang J-6. The aircraft is primarily us ...

, 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 WWII-era Japanese Aircraft carrier, carrier-based fighter ...

, a 1930s Japanese fighter plane * A-5 Vigilante, 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 ...

* Sturzkampfgeschwader 1, from its historic ''Geschwaderkennung'' code with the

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

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 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, which includes the A4, the most commonly available ...

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

wagyu Wagyu (, Hepburn romanization, Hepburn: ''wagyū'', ) is the collective name for the four principal List of Japanese cattle breeds, Japanese breeds of beef cattle. All wagyū cattle originate from early twentieth-century cross-breeding between ...

beef * In

Town and country planning in the United Kingdom Town and country planning in the United Kingdom is the part of UK land law which concerns land use planning. Its goal is to ensure sustainable economic development and a better environment. Each country of the United Kingdom has its own planni ...

, A5 is the code for permission to use specific land or premises for takeaways