Arts and entertainment
Film
* ''Games
* ''A1 – Slave Pits of the Undercity'', a component of '' Scourge of the Slave Lords'' adventure module for ''Dungeons & Dragons'' * Larsen's Opening (ECO code: A01), a chess move * A1, a square on a chessboardMusic and dance
* A1, a part in contra dance choreography * A-1 Sound Studios, a recording studio owned by Herb Abramson * A-1, an American rap group behind the album '' Mash Confusion'' * A-One (band), a Mandopop group * A1 (group), a British–Norwegian boy band * A1 x J1, a British hip hop duoAlbums
* ''A1'', an album by Ertuğ Ergin * ''A1'', an album by Tony Cetinski * '' A One'', an album by Ayumi Hamasaki * ''A1'' (album), a 2002 album by the British–Norwegian band A1Radio
*Publications
* ''A1'' (comics), a comics anthology * '' A-1 Comics'', a 1944–1955 Golden Age comics publication * ''A1—The Great North Road'', a book by Paul GrahamTelevision
* A-One (TV channel), a Russian music channel * A1 Televizija, a former channel in the Republic of North Macedonia * A1 Report, a television station in Albania * America One, an American television networkCompanies
* A1 Film Company, a Burmese cinema company * A-1 Pictures, a Japanese animation studio * A1 Games, an American video game publisher for the PlayStation; see List of PlayStation games (A–L) * A1 Superlink, an Australian Internet service provider merged in 2000 into the ISP Froggy * A-1 Supply, a former name of American gaming machine manufacturer International Game Technology * A1 Telekom Austria, an Austrian mobile network operator, and its subsidiaries ** A1 Slovenija, the second largest telecommunications company in Slovenia ** A1 Bulgaria, mobile network operator in Bulgaria ** A1 Hrvatska, mobile network operator in Croatia ** A1 Belarus, mobile network operator in Belarus ** A1 Srbija, mobile network operator in Serbia ** A1 Macedonia, mobile network operator in North Macedonia * A1 Steam Locomotive Trust, a charitable trust * Ayrshire Bus Owners (A1 Service), a bus operator in ScotlandEducation
* A1, the Basic Language Certificate of the Common European Framework of Reference for Languages * Language A1, the former name for "Language A: literature", one of the IB Group 1 subjects * A1, a secondary school subdivision in the Congolese education system * A1, a baccalauréat series in the education system of some parts of France * A1, a baccalaureate in the Gabonese education system; see Education in Gabon * A1, the highest category of Qualified Flying Instructor in the Central Flying School of the UK Royal Air ForceGrades
* A1, a grade for the Leaving Certificate, Ireland * A1, a grade for the Sijil Pelajaran Malaysia examination, Malaysia * A1, a grade for the Senior Secondary Certificate Examination; see Education in Nigeria * A1, a grade for the Singapore-Cambridge GCE Ordinary Level, Singapore * A-1, an academic grade in PakistanFinance
* A1 or A-1, two investment grades for bonds * A1, a country risk rating assigned by Compagnie Française d'Assurance pour le Commerce ExtérieurMilitary
* List of A1 weapons * A-1 Skyraider, a US military attack aircraft * A-1 flying jacket, the predecessor of the A-2 flying jacket * Company A-1, an outfit in the Texas A&M Corps of Cadets * Svea Artillery Regiment, a Swedish Army regiment * A-1 (code) was the designation for a code used by the United States Navy during World War I * A1, a designation of military staff in the continental staff system * A-1, a grade of Republic of China; see Orders, decorations, and medals of the Republic of China * Forces A1, a naval force in the Battle of Crete; see Crete order of battle * AMX International AMX (Brazilian Air Forces designation: A-1), an aircraft * Kampfgeschwader 53 (identification symbol: A1), a Luftwaffe bomber wing during World War IIPeople
* A-1 (wrestler) (born 1977), Canadian professional wrestler * Floyd Bentley (born 1987), record producer and reality TV star also known as A1 * Aone Beats or Aone, music producer * A-One (graffiti artist) (born 1964) American graffiti artistPolitics and government
* A-1 visa, a non-immigrant US visa for governmental officials * A1, an electoral alliance in Suriname; see List of political parties in Suriname * A1, a class of South Korean visa * A-1, a classification in the status of Indian cities * A1, a rank in the European Civil Service * A1, one of the planning use classes in England and Wales * A1, a classification of race by law enforcement in England and WalesPlaces
* A1 Mine Settlement, Victoria, Australia * Zone A1, a zone in the Alonissos Marine Park, North Aegean Sea, GreeceScience and technology
Astronomy
* A1, a stellar classification * A1, a subobject designation; for example NGC 3603-A1Biology
* List of A1 genes, proteins or receptors * A1 broth, a substance used to detect fecal coliforms * ATC code A01 ''Stomatological preparations'', a subgroup of the Anatomical Therapeutic Chemical Classification System * Combretastatin A1, a potent cytotoxic agent * HLA-A1, a human leukocyte antigen serotype * Proanthocyanidin A1, an A type proanthocyanidin * Primary auditory cortex, the region of the cerebral cortex where sound is processed * Vitamin A1, the animal form of vitamin A * A1, a segment of the anterior cerebral artery * A1, the first anal vein in the Comstock-Needham system of insect wing vein naming * Noradrenergic cell group A1 * A1, a mating type of '' Phytophthora infestans'', the cause of potato blightComputing
* A-1, a 1950s programming language successor to the A-0 System * Windows Live OneCare (codename: A1), former computer security software * A1, a class of computer security specified in the Trusted Computer System Evaluation Criteria * Acer Aspire One, a netbook computerEarth sciences
* A1, a landslide classification factor * A-1, a class in the AASHTO Soil Classification SystemElectronics
* Canon A-1, a 35 mm SLR camera manufactured from 1978 to 1985 * Canon XH-A1, a handheld prosumer HDV camcorder released in 2007 * Minolta DiMAGE A1, a digital camera introduced in 2003 * Sony HVR-A1, the prosumer version of the Sony HDR-HC1 camcorder, which was introduced in 2005 * AVM A1-Card, an ISDN card produced by German company AVM GmbH * A1 VSTi, a 2002 synthesizer software program produced byMathematics
* A¹ homotopy theory, a concept related to algebraic topology * A1, an 1844 paper by mathematician Hermann Grassmann * A1, thePhysics
* A-1 (nuclear reactor), the second Soviet reactorOther science and technology
* A-1, the first series of Disney's Audio-Animatronics figures * KS 150 or A-1, a nuclear reactor in Czechoslovakia, decommissioned in 1979 * A.1 scale, an atomic time scale in the International Atomic Time standardSports
Leagues or divisions
* A1 sport league (disambiguation) * A1, a climbing grade * A1, a ranking in Keirin track cycling * Class A1 (baseball), a defunct classification within Minor League BaseballCompetitions
* A1 (classification), an amputee sport classification * A1 Grand Prix, a motorsport racing series *Transportation
Aircraft
* List of A1 aircraft * A-1 (airship) * Douglas A-1 Skyraider * Albastar A1, a glider * Model 3 A-1, an Aeronautical Products rotorcraft, see List of rotorcraftCars
* A1, a tyre code * A1 Grand Prix car * Anadol A1, a 1966 Turkish car * Arrows A1, a 1978 British racing car * Audi A1, a supermini automobile produced from 2010 * Audi Quattro A1, a 1983 rally car * Chery A1 * Scania A1, a 1901 car * Toyota A1, a 1935 car prototype * A1 registration plate, a UK vehicle registration plate * A1, a Volkswagen Group A platform * A-1, a 1939 Buick Roadmaster Series 81C used by Norwegian royaltyMaritime
* A1 (shipping), a symbol indicating shipbuilding quality * Sea Area A1, a designation in the Global Maritime Distress Safety SystemSurface vessels
* A-1 lifeboat * USS ''A-1'', several US Navy ships * ARA ''Comandante General Irigoyen'' (A-1), an Argentine Navy auxiliary shipSubmarines
* HMS ''A1'', a British A-class submarine of the Royal Navy * Type A1 submarine, a type of Japanese Navy submarine * HNoMS ''Kobben'' (A-1), a Royal Norwegian Navy submarineMotorcycles
* A1, a Haden frame * A1, a Motosacoche motorcycle * A-1, a 1976 Alligator * Automatic A1, a Tomos motorcycle * A1 Samurai, in the list of Kawasaki motorcyclesRoads
* List of A1 roadsSpacecraft
Satellites
* A-001, the second abort test of the Apollo spacecraft * Anik A1, a Canadian satellite * Aussat (Optus) A1, a 1985 Australian telecommunications satellite * Orbcomm A1, a 1997 American low Earth orbit communications satellite * Palapa A1, the first 1976 Indonesian Palapa satellite * Superbird A1, a satellite put into orbit by an Ariane launch in 1992 * Astérix (satellite) or A1, the first French satelliteRockets
* A1, a model of German Aggregate series rocket from World War II * Hermes A-1, a rocket in the Hermes project * Saturn A-1, a 1959 American rocket * Scout A-1, a 1965 American rocketTrains and public transit
* Bavarian A I, an 1844 German steam locomotive model * LB&SCR A1 class, a class of locomotives designed by Stroudley and known as the ''Terriers'' * LNER Gresley Classes A1 and A3, a locomotive class designed by Sir Nigel Gresley, including the ''Flying Scotsman'' * LNER Thompson Class A1/1, the rebuild of 4470 ''Great Northern'' by Edward Thompson * LNER Peppercorn Class A1, a class of Pacific locomotives designed by Arthur Peppercorn *Other uses
* A1 paper size (59.4×84.1 centimetres or 23.4×33.1 inches) * A.1. Sauce, a brand of brown sauce * A1, a colour grade used in shrimp marketing * Front of house engineer or A1, a type of sound operatorSee also
* * A1 Ring, the former name for the Red Bull Ring, a motorsport circuit in Spielberg, Austria * 1A (disambiguation) * A-1 Yola (disambiguation) * AL (disambiguation) * Alpha 1 (disambiguation) * Aleph One (disambiguation) * A10 (disambiguation) * Jet A-1, a type of aviation fuel * {{Letter-Number Combination Disambiguation