A1, A-1, A01 or A.1. may refer to:

Education

* 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 Education in the Republic of the Congo, 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 Force

Grades

* A1, a grade for the Irish Leaving Certificate, Leaving Certificate, a qualification in the education system of Ireland * A1, the highest obtainable grade for the Sijil Pelajaran Malaysia examination in Malaysia * A1, a grade for the Senior Secondary Certificate Examination in Nigeria, see Education in Nigeria * A1, a grade for the Singaporean GCE 'O' Level, an examination in the education system of Singapore * A-1, an Academic grading in Pakistan commonly used in the education system of Pakistan

Entertainment

* sound operator, a member of a theatre crew commonly designated A1

Broadcasting

* A-One (TV channel), a Russian music channel * A1 TV channel (Macedonia) * A1 Report, a television station in Albania * America One, an American television network * A 1, see List of radio stations in Austria and Liechtenstein * A1, a promotional name for CHIN (AM) radio in Canada * A1, a Slovenian radio network owned by Radiotelevizija Slovenija * A-1 Detective Agency, a fictional detective agency in the radio series ''I Love a Mystery''

Film

* ''A-1 Headline'', a 2004 Hong Kong film * ''A 001, operazione Giamaica'' (''Our Man in Jamaica''), a 1965 Italian adventure film directed by Ernst R. von Theumer * ''A1'', a 1999 Syrian film, see List of Syrian films * A1 (2019 film), ''A1'' (2019 film), Indian Tamil film ;Companies * A1 Film Company, a Burmese cinema company * A-1 Pictures, a Japanese animation studio

Games

* A1 Games, an American video game publisher for the PlayStation; see List of PlayStation games (A–L) * ''A1 – Slave Pits of the Undercity'', a component of ''Scourge of the Slave Lords'', and adventure module for the ''Dungeons & Dragons'' role-playing game * Larsen's Opening, a chess move, A01 in ECO code * A1, a square on a chessboard

Music and dance

* Aone Beats or Aone, music producer * 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 (band), a British-Norwegian boy band * Floyd "A1" Bentley, record producer and reality TV star (from Love & Hip Hop: Hollywood) * A1 x J1, a British hip hop duo

Albums

* ''A1'', an album by Ertuğ Ergin * ''A1'', an album by Tony Cetinski * ''A One'', an album by Ayumi Hamasaki * A1 (album), ''A1'' (album), a 2002 album by Norwegian band A1

Publications

* A1 (comics), ''A1'' (comics), a comics anthology * ''A-1 Comics'', a 1944–1955 Golden Age comics publication * ''A1—The Great North Road'', a book by Paul Graham (photographer)

Finance

* A1 or A-1, two investment grades for bonds * A1, a country risk rating assigned by Compagnie Francaise D’assurance Pour Le Commerce Exterieur (Coface)

Food

* A.1. Sauce * A1, a colour grade used in shrimp marketing

Military

* A-1 Skyraider, a United States 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 Staff (military)#Continental Staff System, continental staff system * A-1, a grade of Republic of China List of orders, decorations and medals of the Republic of China#General Armed Forces medals * Forces A1, a naval force in the Battle of Crete, see Crete order of battle * A-1, Brazilian Air Forces designation for the AMX International AMX aircraft * Kampfgeschwader 53, from its historic ''Geschwaderkennung'' code with the Luftwaffe in World War II

Politics and government

Americas

* A-1 visa, a non-immigrant United States visa for governmental officials * A1, an electoral alliance in Suriname, see List of political parties in Suriname

Asia

* A1, a class of List of South Korean visas, South Korean visa * A-1, a classification in the status of Indian cities

Europe

* A1, a rank in the European Civil Service * A1, a planning use classes in England and Wales, town planning use class in England and Wales * A1, a race (human categorization)#Law enforcement, racial classification by law enforcement in England and Wales

Places

* A1 Mine Settlement, Victoria, Australia * Red Bull Ring (formerly ''A1''), a motorsport circuit in Spielberg, Austria * List of A1 roads * Zone A1, a zone in the Greek Alonissos Marine Park in the North Aegean Sea

Science and mathematics

Astronomy

* A1, a class of star, see stellar classification * "A1" subobject designations, including: ** NGC 3603-A1

Biology

* 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 * 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 blight

Earth sciences

* A1, a landslide classification factor * A-1, a class in the AASHTO Soil Classification System

Mathematics

* A¹ homotopy theory, a concept related to algebraic topology * A1, an 1844 paper by mathematician Hermann Grassmann * A₁, the alternating group on a set with one only element

Sports

Leagues or divisions

* A1 Ring, the former name for the Red Bull Ring, a motorsport circuit in Spielberg, Austria * A1, a climbing grade * A1, a ranking in Keirin track cycling * Class A1 (baseball), a defunct classification within Minor League Baseball

Competition

* A1 (classification), an amputee sport classification * A1 Grand Prix, a motorsport racing series * A-1 Liga, the top basketball league in Croatia * HEBA A1, the top basketball league in Greece * Phase A1, a phase in a combined driving equestrian competition

Individuals

* A-1 (wrestler), A-1 (born 1977), Canadian professional wrestler

Technology

* A1 paper size (59.4×84.1 centimetres or 23.4×33.1 inches) * A-1, the first series of Disney's Audio-Animatronics figures * A-1, an alternative name for KS 150, a nuclear reactor in Czechoslovakia, decommissioned in 1979 * A.1 scale, the first formalised atomic time scale in the International Atomic Time standard

Computing

* A-1, a programming language that was a successor to the A-0 System written by Grace Hopper in the 1950s * A1, codename for Windows Live OneCare * A1, a class of computer security specified in the Trusted Computer System Evaluation Criteria * Acer Aspire One netbook computer

Commercial brands and companies

* A1 Superlink, an Australian Internet service provider merged in 2000 into the Froggy (ISP) * A-1 Supply, a former name of American gaming machine manufacturer International Game Technology (1975), 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

Electronic products

* 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 produced 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 by Waldorf Music * Xiaomi Mi A1, a smartphone released in 2017, part of series Mi and Android One * Samsung Galaxy A01, a smartphone released in 2020

Vehicles and transport

Aircraft

* A-1 (airship) * A-1 Skyraider * Albastar A1, glider * Model 3 A-1, an Aeronautical Products rotorcraft, see List of rotorcraft

Cars

* 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 royalty

Maritime

* A1 (shipping), a symbol indicating shipbuilding quality * Sea Area A1, a designation in the Global Maritime Distress Safety System

Surface vessels

* A-1 lifeboat * , the name of multiple US Navy ships * , an Argentine Navy auxiliary ship

Submarines

* , a British A-class submarine of the Royal Navy * A1 type submarine, a type of Japanese Navy submarine * , a Royal Norwegian Navy submarine

Motorcycles

* A1, a Haden (motorcycle) frame * A1, a Motosacoche motorcycle * A-1, a 1976 Alligator (motorcycle) * Automatic A1, a Tomos motorcycle * A1 Samurai, see List of Kawasaki motorcycles

Roads

* Highways designated ''A1'' in several countries; see List of A1 roads

Spacecraft

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 list of Ariane launches, Ariane 4 launch on 1 December 1992 * A1, a designation for the French satellite Astérix (satellite)

Rockets

* A1, a model of German Aggregate (rocket family)#A1, 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 rocket

Fictional spacecraft

* Alpha-One spacecraft, a fictional spacecraft in the film ''Buzz Lightyear of Star Command: The Adventure Begins''

Trains and public transit

* A1 Steam Locomotive Trust, a charitable trust * Ayrshire Bus Owners (A1 Service), a bus operator in Scotland * 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 Pacific locomotive designed by Arthur Peppercorn * NCC Class A1, a 1901 Irish 4-4-0 passenger steam locomotives * Nishi-magome Station, a Japanese subway station * PRR A1, an American PRR steam locomotive * Prussian A 1, a 1907 German Prussian railbus * RER A1, a rapid transit line in France * SP&S Class A1, a 1907 steam locomotives class * Tel Aviv–Jerusalem railway, built on the “A1 Route” * Type A1 or ''California combination'', an Trams in Adelaide#Electric tram types, Electric tram type * 0-2-2, the UIC classification for the Whyte notation of locomotive wheel arrangements