A1, A-1, A01 or A.1. may refer to:
Arts and entertainment
Film
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A-1 Headline, a 2004 Hong Kong film
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A 001, operazione Giamaica (English title: Our Man in Jamaica), a 1965 Italian film
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A1, a 1999 Syrian film; see List of Syrian films
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A1 (2019 film), Indian Tamil film
Games
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A1 – Slave Pits of the Undercity, a component of Scourge of the Slave Lords adventure module for Dungeons & Dragons
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Larsen's Opening (ECO code: A01), a chess move
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A1, a square on a chessboard
Music and dance
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A1, a part in contra dance choreography
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A-1 Sound Studios, a recording studio owned by Herb Abramson
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A-1, an American rap group behind the album Mash Confusion
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A-One (band), a Mandopop group
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A1 (group), a British–Norwegian boy band
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A1 x J1, a British hip hop duo
Albums
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A1, an album by Ertuğ Ergin
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A1, an album by Tony Cetinski
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A One, an album by Ayumi Hamasaki
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A1 (album), a 2002 album by the British–Norwegian band A1
Radio
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CHIN (AM) (promotional name: A1), a station in Canada
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A1, a Slovenian radio network owned by Radiotelevizija Slovenija
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A-1 Detective Agency, a fictional detective agency in the radio series I Love a Mystery
Publications
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A1 (comics), a comics anthology
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A-1 Comics, a 1944–1955 Golden Age comics publication
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A1—The Great North Road, a book by Paul Graham
Television
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A-One (TV channel), a Russian music channel
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A1 Televizija, a former channel in the Republic of North Macedonia
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A1 Report, a television station in Albania
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America One, an American television network
Companies
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A1 Film Company, a Burmese cinema company
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A-1 Pictures, a Japanese animation studio
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A1 Games, an American video game publisher for the PlayStation; see List of PlayStation games (A–L)
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A1 Superlink, an Australian Internet service provider merged in 2000 into the ISP Froggy
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A-1 Supply, a former name of American gaming machine manufacturer International Game Technology
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A1 Telekom Austria, an Austrian mobile network operator, and its subsidiaries
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A1 Slovenija, the second largest telecommunications company in Slovenia
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A1 Bulgaria, mobile network operator in Bulgaria
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A1 Hrvatska, mobile network operator in Croatia
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A1 Belarus, mobile network operator in Belarus
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A1 Srbija, mobile network operator in Serbia
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A1 Macedonia, mobile network operator in North Macedonia
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A1 Steam Locomotive Trust, a charitable trust
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Ayrshire Bus Owners (A1 Service), a bus operator in Scotland
Education
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A1, the Basic Language Certificate of the Common European Framework of Reference for Languages
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Language A1, the former name for "Language A: literature", one of the IB Group 1 subjects
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A1, a secondary school subdivision in the Congolese education system
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A1, a baccalauréat series in the education system of some parts of France
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A1, a baccalaureate in the Gabonese education system; see Education in Gabon
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A1, the highest category of Qualified Flying Instructor in the Central Flying School of the UK Royal Air Force
Grades
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A1, a grade for the Leaving Certificate, Ireland
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A1, a grade for the Sijil Pelajaran Malaysia examination, Malaysia
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A1, a grade for the Senior Secondary Certificate Examination; see Education in Nigeria
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A1, a grade for the Singapore-Cambridge GCE Ordinary Level, Singapore
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A-1, an academic grade in Pakistan
Finance
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A1 or A-1, two for bonds
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A1, a country risk rating assigned by Compagnie Française d'Assurance pour le Commerce Extérieur
Military
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List of A1 weapons
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A-1 Skyraider, a US military attack aircraft
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A-1 flying jacket, the predecessor of the A-2 flying jacket
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Company A-1, an outfit in the Texas A&M Corps of Cadets
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Svea Artillery Regiment, a Swedish Army regiment
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A-1 (code) was the designation for a code used by the United States Navy during World War I
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A1, a designation of military staff in the continental staff system
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A-1, a grade of Republic of China; see Orders, decorations, and medals of the Republic of China
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Forces A1, a naval force in the Battle of Crete; see Crete order of battle
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AMX International AMX (Brazilian Air Forces designation: A-1), an aircraft
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Kampfgeschwader 53 (identification symbol: A1), a Luftwaffe bomber wing during World War II
People
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A-1 (wrestler) (born 1977), Canadian professional wrestler
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Floyd Bentley (born 1987), record producer and reality TV star also known as A1
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Aone Beats or Aone, music producer
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A-One (graffiti artist) (born 1964) American graffiti artist
Politics and government
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A-1 visa, a non-immigrant US visa for governmental officials
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A1, an electoral alliance in Suriname; see List of political parties in Suriname
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A1, a class of South Korean visa
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A-1, a classification in the status of Indian cities
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A1, a rank in the European Civil Service
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A1, one of the planning use classes in England and Wales
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A1, a classification of race by law enforcement in England and Wales
Places
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A1 Mine Settlement, Victoria, Australia
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Zone A1, a zone in the Alonissos Marine Park, North Aegean Sea, Greece
Science and technology
Astronomy
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A1, a stellar classification
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A1, a subobject designation; for example NGC 3603-A1
Biology
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List of A1 genes, proteins or receptors
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A1 broth, a substance used to detect fecal coliforms
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ATC code A01 Stomatological preparations, a subgroup of the Anatomical Therapeutic Chemical Classification System
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Combretastatin A1, a potent cytotoxic agent
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HLA-A1, a human leukocyte antigen serotype
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Proanthocyanidin A1, an A type proanthocyanidin
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Primary auditory cortex, the region of the cerebral cortex where sound is processed
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Vitamin A1, the animal form of vitamin A
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A1, a segment of the anterior cerebral artery
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A1, the first anal vein in the Comstock-Needham system of insect wing vein naming
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Noradrenergic cell group A1
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A1, a mating type of Phytophthora infestans, the cause of potato blight
Computing
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A-1, a 1950s programming language successor to the A-0 System
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Windows Live OneCare (codename: A1), former computer security software
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A1, a class of computer security specified in the Trusted Computer System Evaluation Criteria
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Acer Aspire One, a netbook computer
Earth sciences
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A1, a landslide classification factor
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A-1, a class in the AASHTO Soil Classification System
Electronics
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Canon A-1, a 35 mm SLR camera manufactured from 1978 to 1985
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Canon XH-A1, a handheld prosumer HDV camcorder released in 2007
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Minolta DiMAGE A1, a digital camera introduced in 2003
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Sony HVR-A1, the prosumer version of the Sony HDR-HC1 camcorder, which was introduced in 2005
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AVM A1-Card, an ISDN card produced by German company AVM GmbH
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A1 VSTi, a 2002 synthesizer software program produced by Waldorf Music
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Xiaomi Mi A1, a smartphone released in 2017, part of series Mi and Android One
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Samsung Galaxy A01, a smartphone released in 2020
Mathematics
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A¹ homotopy theory, a concept related to algebraic topology
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A1, an 1844 paper by mathematician Hermann Grassmann
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A1, the alternating group on a set with one only element
Physics
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A-1 (nuclear reactor), the second Soviet reactor
Other science and technology
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A-1, the first series of Disney's Audio-Animatronics figures
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KS 150 or A-1, a nuclear reactor in Czechoslovakia, decommissioned in 1979
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A.1 scale, an atomic time scale in the International Atomic Time standard
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Lely Astronaut A1, the first version of the Astronaut robot manufactured by Lely
Sports
Leagues or divisions
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A1 sport league (disambiguation)
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A1, a climbing grade
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A1, a ranking in Keirin track cycling
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Class A1 (baseball), a defunct classification within Minor League Baseball
Competitions
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A1 (classification), an amputee sport classification
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A1 Grand Prix, a motorsport racing series
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A-1 Liga, the top basketball league in Croatia
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HEBA A1, the top basketball league in Greece
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Phase A1, a phase in a combined driving equestrian competition
Transportation
Aircraft
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List of A1 aircraft
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A-1 (airship)
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Douglas A-1 Skyraider, an American single-seat attack aircraft
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Albastar A1, a glider
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Model 3 A-1, an Aeronautical Products rotorcraft, see List of rotorcraft
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Antigravity A1, a Chinese teleoperated quadcopter drone produced by Antigravity, a subsidiary of Insta360
Cars
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A1, a tyre code
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A1 Grand Prix car
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Anadol A1, a 1966 Turkish car
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Arrows A1, a 1978 British racing car
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Audi A1, a supermini automobile produced from 2010
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Audi Quattro A1, a 1983 rally car
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Chery A1
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Scania A1, a 1901 car
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Toyota A1, a 1935 car prototype
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A1 registration plate, a UK vehicle registration plate
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A1, a Volkswagen Group A platform
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A-1, a 1939 Buick Roadmaster Series 81C used by Norwegian royalty
Maritime
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A1 (shipping), a symbol indicating shipbuilding quality
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Sea Area A1, a designation in the Global Maritime Distress Safety System
Surface vessels
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A-1 lifeboat
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USS A-1, several US Navy ships
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ARA Comandante General Irigoyen (A-1), an Argentine Navy auxiliary ship
Submarines
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HMS A1, a British A-class submarine of the Royal Navy
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Type A1 submarine, a type of Japanese Navy submarine
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HNoMS Kobben (A-1), a Royal Norwegian Navy submarine
Motorcycles
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A1, a Haden frame
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A1, a Motosacoche motorcycle
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A-1, a 1976 Alligator
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Automatic A1, a Tomos motorcycle
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A1 Samurai, in the list of Kawasaki motorcycles
Roads
Spacecraft
Satellites
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A-001, the second abort test of the Apollo spacecraft
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Anik A1, a Canadian satellite
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Aussat (Optus) A1, a 1985 Australian telecommunications satellite
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Orbcomm A1, a 1997 American low Earth orbit communications satellite
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Palapa A1, the first 1976 Indonesian Palapa satellite
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Superbird A1, a satellite put into orbit by an Ariane launch in 1992
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Astérix (satellite) or A1, the first French satellite
Rockets
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A1, a model of German Aggregate series rocket from World War II
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Hermes A-1, a rocket in the Hermes project
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Saturn A-1, a 1959 American rocket
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Scout A-1, a 1965 American rocket
Trains and public transit
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Bavarian A I, an 1844 German steam locomotive model
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LB&SCR A1 class, a class of locomotives designed by Stroudley and known as the Terriers
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LNER Gresley Classes A1 and A3, a locomotive class designed by Sir Nigel Gresley, including the Flying Scotsman
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LNER Thompson Class A1/1, the rebuild of 4470 Great Northern by Edward Thompson
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LNER Peppercorn Class A1, a class of Pacific locomotives designed by Arthur Peppercorn
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NCC Class A1, 1901 Irish 4-4-0 passenger steam locomotives
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Nishi-magome Station (station number: A-01), a Japanese subway station
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Pennsylvania Railroad class A1, an American PRR steam locomotive
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Prussian A 1, a 1907 German Prussian railbus
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RER A1, a RER A rapid transit line in France
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SP&S Class A1, a 1907 steam locomotives class
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Tel Aviv–Jerusalem railway, built on the “A1 Route”
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Type A1, a type of electric tram in Adelaide, Australia
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0-2-2 (UIC classification: A1), locomotive wheel arrangements
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A1, a train model uses in Guangzhou Metro
Other uses
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A1 paper size (59.4×84.1 centimetres or 23.4×33.1 inches)
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A.1. Sauce, a brand of brown sauce
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A1, a colour grade used in shrimp marketing
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Front of house engineer or A1, a type of sound operator
See also
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A1 Ring, the former name for the Red Bull Ring, a motorsport circuit in Spielberg, Austria
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1A (disambiguation)
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A-1 Yola (disambiguation)
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AL (disambiguation)
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Alpha 1 (disambiguation)
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Aleph One (disambiguation)
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A10 (disambiguation)
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Jet A-1, a type of aviation fuel