A1

For the Wikipedia A1 criterion for speedy deletion, see Wikipedia:Criteria for speedy deletion § A1.

Look up A 1, A1, or a1 in Wiktionary, the free dictionary.

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

Arts and entertainment

Film

A-1 Headline, a 2004 Hong Kong film
A 001, operazione Giamaica (English title: Our Man in Jamaica), a 1965 Italian film
A1, a 1999 Syrian film; see List of Syrian films
A1 (2019 film), Indian Tamil 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 chessboard

Music 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 duo

Albums

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 A1

Radio

CHIN (AM) (promotional name: A1), a station 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

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 Graham

Television

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 network

Companies

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 Scotland

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 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 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 Pakistan

Finance

A1 or A-1, two investment grades for bonds
A1, a country risk rating assigned by Compagnie Française d'Assurance pour le Commerce Extérieur

Military

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 II

People

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

Politics 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 Wales

Places

A1 Mine Settlement, Victoria, Australia
Zone A1, a zone in the Alonissos Marine Park, North Aegean Sea, Greece

Science and technology

Astronomy

A1, a stellar classification
A1, a subobject designation; for example NGC 3603-A1

Biology

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 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

Computing

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 computer

Electronics

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

Other 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 standard

Sports

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 Baseball

Competitions

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

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 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
USS A-1, several US Navy ships
ARA Comandante General Irigoyen (A-1), an Argentine Navy auxiliary ship

Submarines

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 submarine

Motorcycles

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 motorcycles

Roads

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 Ariane launch in 1992
Astérix (satellite) or A1, the first French satellite

Rockets

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 rocket

Trains 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
NCC Class A1, 1901 Irish 4-4-0 passenger steam locomotives
Nishi-magome Station (station number: A-01), a Japanese subway station
Pennsylvania Railroad class A1, an American PRR steam locomotive
Prussian A 1, a 1907 German Prussian railbus
RER A1, a RER 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, a type of electric tram in Adelaide, Australia
0-2-2 (UIC classification: A1), locomotive wheel arrangements