# A1

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{{Selfref|For the Wikipedia A1 criterion for speedy deletion, see {{slink|Wikipedia:Criteria for speedy deletion#A1}}.}}
{{Wiktionary|A 1|A1|a1}}
'''A1''', '''A-1''', '''A01''' or '''A.1.''' may refer to:
{{TOC right}}
==Arts and entertainment==
===Film===
* ''[A-1 Headline](/source/A-1_Headline)'', a 2004 Hong Kong film
* {{lang|it|[A 001, operazione Giamaica](/source/A_001%2C_operazione_Giamaica)}} (English title: ''Our Man in Jamaica''), a 1965 Italian film
* ''A1'', a 1999 Syrian film; see [List of Syrian films](/source/List_of_Syrian_films)
* [''A1'' (2019 film)](/source/A1_(2019_film)), Indian Tamil film

===Games===
* ''A1 – Slave Pits of the Undercity'', a component of ''[Scourge of the Slave Lords](/source/Scourge_of_the_Slave_Lords)'' adventure module for ''Dungeons & Dragons''
* [Larsen's Opening](/source/Larsen's_Opening) (ECO code: A01), a chess move
* A1, a square on a [chessboard](/source/chessboard)

===Music and dance===
* A1, a part in [contra dance choreography](/source/contra_dance_choreography)
* A-1 Sound Studios, a recording studio owned by [Herb Abramson](/source/Herb_Abramson)
* A-1, an American rap group behind the album ''[Mash Confusion](/source/Mash_Confusion)''
* [A-One (band)](/source/A-One_(band)), a Mandopop group
* [A1 (group)](/source/A1_(group)), a British–Norwegian boy band
* [A1 x J1](/source/A1_x_J1), a British hip hop duo

====Albums====
* ''A1'', an album by [Ertuğ Ergin](/source/Ertu%C4%9F_Ergin)
* ''A1'', an album by [Tony Cetinski](/source/Tony_Cetinski)
* ''[A One](/source/A_One)'', an album by Ayumi Hamasaki
* [''A1'' (album)](/source/A1_(album)), a 2002 album by the British–Norwegian band A1

===Radio===
* [CHIN (AM)](/source/CHIN_(AM)) (promotional name: A1), a station in Canada
* A1, a Slovenian radio network owned by [Radiotelevizija Slovenija](/source/Radiotelevizija_Slovenija)
* A-1 Detective Agency, a fictional detective agency in the radio series ''[I Love a Mystery](/source/I_Love_a_Mystery)''

===Publications===
* [''A1'' (comics)](/source/A1_(comics)), a comics anthology
* ''[A-1 Comics](/source/A-1_Comics)'', a 1944–1955 Golden Age comics publication
* ''A1—The Great North Road'', a book by [Paul Graham](/source/Paul_Graham_(photographer))

===Television===
* [A-One (TV channel)](/source/A-One_(TV_channel)), a Russian music channel
* [A1 Televizija](/source/A1_Televizija), a former channel in the Republic of North Macedonia
* [A1 Report](/source/A1_Report), a television station in Albania
* [America One](/source/America_One), an American television network

==Companies==
* [A1 Film Company](/source/A1_Film_Company), a Burmese cinema company
* [A-1 Pictures](/source/A-1_Pictures), a Japanese animation studio
* A1 Games, an American video game publisher for the PlayStation; see [List of PlayStation games (A–L)](/source/List_of_PlayStation_games_(A%E2%80%93L))
* A1 Superlink, an Australian Internet service provider merged in 2000 into the ISP [Froggy](/source/Froggy_(ISP))
* A-1 Supply, a former name of American gaming machine manufacturer [International Game Technology](/source/International_Game_Technology_(1975))
* [A1 Telekom Austria](/source/A1_Telekom_Austria), an Austrian mobile network operator, and its subsidiaries
** [A1 Slovenija](/source/A1_Slovenija), the second largest telecommunications company in Slovenia
** [A1 Bulgaria](/source/A1_Bulgaria), mobile network operator in Bulgaria
** [A1 Hrvatska](/source/A1_Hrvatska), mobile network operator in Croatia
** [A1 Belarus](/source/A1_Belarus), mobile network operator in Belarus
** [A1 Srbija](/source/A1_Srbija), mobile network operator in Serbia
** [A1 Macedonia](/source/A1_Macedonia), mobile network operator in North Macedonia
* [A1 Steam Locomotive Trust](/source/A1_Steam_Locomotive_Trust), a charitable trust
* [Ayrshire Bus Owners (A1 Service)](/source/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](/source/Common_European_Framework_of_Reference_for_Languages)
* Language A1, the former name for "Language A: literature", one of the [IB Group 1 subjects](/source/IB_Group_1_subjects)
* A1, a secondary school subdivision in the [Congolese education system](/source/education_in_the_Republic_of_the_Congo)
* A1, a [baccalauréat](/source/baccalaur%C3%A9at) series in the education system of some parts of France
* A1, a baccalaureate in the Gabonese education system; see [Education in Gabon](/source/Education_in_Gabon)
* A1, the highest category of [Qualified Flying Instructor](/source/Qualified_Flying_Instructor) in the Central Flying School of the UK Royal Air Force

===Grades===
* A1, a grade for the [Leaving Certificate](/source/Leaving_Certificate_(Ireland)), Ireland
* A1, a grade for the [Sijil Pelajaran Malaysia](/source/Sijil_Pelajaran_Malaysia) examination, Malaysia
* A1, a grade for the Senior Secondary Certificate Examination; see [Education in Nigeria](/source/Education_in_Nigeria)
* A1, a grade for the [Singapore-Cambridge GCE Ordinary Level](/source/Singapore-Cambridge_GCE_Ordinary_Level), Singapore
* A-1, an [academic grade in Pakistan](/source/academic_grading_in_Pakistan)

==Finance==
* A1 or A-1, two [investment grade](/source/investment_grade)s for bonds
* A1, a country risk rating assigned by [Compagnie Française d'Assurance pour le Commerce Extérieur](/source/Compagnie_Fran%C3%A7aise_d'Assurance_pour_le_Commerce_Ext%C3%A9rieur)

==Military==
* [List of A1 weapons](/source/List_of_A1_weapons)
* [A-1 Skyraider](/source/A-1_Skyraider), a US military attack aircraft
* [A-1 flying jacket](/source/A-1_flying_jacket), the predecessor of the A-2 flying jacket
* [Company A-1](/source/Company_A-1), an outfit in the Texas A&M Corps of Cadets
* [Svea Artillery Regiment](/source/Svea_Artillery_Regiment), a Swedish Army regiment
* [A-1 (code)](/source/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](/source/staff_(military)) system
* A-1, a grade of Republic of China; see [Orders, decorations, and medals of the Republic of China](/source/Orders%2C_decorations%2C_and_medals_of_the_Republic_of_China)
* Forces A1, a naval force in the Battle of Crete; see [Crete order of battle](/source/Crete_order_of_battle)
* [AMX International AMX](/source/AMX_International_AMX) (Brazilian Air Forces designation: A-1), an aircraft
* [Kampfgeschwader 53](/source/Kampfgeschwader_53) (identification symbol: A1), a Luftwaffe bomber wing during World War II

==People==
* [A-1 (wrestler)](/source/A-1_(wrestler)) (born 1977), Canadian professional wrestler
* [Floyd Bentley](/source/Floyd_Bentley) (born 1987), record producer and reality TV star also known as A1
* [Aone Beats](/source/Aone_Beats) or Aone, music producer
* [A-One (graffiti artist)](/source/A-One_(graffiti_artist)) (born 1964) American graffiti artist

==Politics and government==
* [A-1 visa](/source/A-1_visa), a non-immigrant US visa for governmental officials
* A1, an electoral alliance in Suriname; see [List of political parties in Suriname](/source/List_of_political_parties_in_Suriname)
* A1, a class of [South Korean visa](/source/list_of_South_Korean_visas)
* A-1, a classification in the [status of Indian cities](/source/status_of_Indian_cities)
* A1, a rank in the [European Civil Service](/source/European_Civil_Service)
* A1, one of the [planning use classes in England and Wales](/source/planning_use_classes_in_England_and_Wales)
* A1, a classification of [race](/source/race_(human_categorization)) by law enforcement in England and Wales

==Places==
* [A1 Mine Settlement](/source/A1_Mine_Settlement), Victoria, Australia
* Zone A1, a zone in the [Alonissos Marine Park](/source/Alonissos_Marine_Park), North Aegean Sea, Greece

==Science and technology==
===Astronomy===
* A1, a [stellar classification](/source/stellar_classification)
* A1, a subobject designation; for example [NGC 3603-A1](/source/NGC_3603-A1)

===Biology===
* [List of A1 genes, proteins or receptors](/source/List_of_A1_genes%2C_proteins_or_receptors)
* [A1 broth](/source/A1_broth), a substance used to detect fecal coliforms
* [ATC code A01](/source/ATC_code_A01) ''Stomatological preparations'', a subgroup of the Anatomical Therapeutic Chemical Classification System
* [Combretastatin A1](/source/Combretastatin_A1), a potent cytotoxic agent
* [HLA-A1](/source/HLA-A1), a human leukocyte antigen serotype
* [Proanthocyanidin A1](/source/Proanthocyanidin_A1), an A type proanthocyanidin
* [Primary auditory cortex](/source/Primary_auditory_cortex), the region of the cerebral cortex where sound is processed
* [Vitamin A1](/source/Vitamin_A1), the animal form of vitamin A
* A1, a segment of the [anterior cerebral artery](/source/anterior_cerebral_artery)
* A1, the first [anal vein](/source/anal_vein) in the Comstock-Needham system of insect wing vein naming
* [Noradrenergic cell group A1](/source/Noradrenergic_cell_group_A1)
* A1, a mating type of ''[Phytophthora infestans](/source/Phytophthora_infestans)'', the cause of potato blight

===Computing===
* A-1, a 1950s programming language successor to the [A-0 System](/source/A-0_System)
* [Windows Live OneCare](/source/Windows_Live_OneCare) (codename: A1), former computer security software
* A1, a class of computer security specified in the [Trusted Computer System Evaluation Criteria](/source/Trusted_Computer_System_Evaluation_Criteria)
* [Acer Aspire One](/source/Acer_Aspire_One), a netbook computer

===Earth sciences===
* A1, a [landslide classification](/source/landslide_classification) factor
* A-1, a class in the [AASHTO Soil Classification System](/source/AASHTO_Soil_Classification_System)

===Electronics===
* [Canon A-1](/source/Canon_A-1), a 35 mm SLR camera manufactured from 1978 to 1985
* [Canon XH-A1](/source/Canon_XH-A1), a handheld prosumer HDV camcorder released in 2007
* [Minolta DiMAGE A1](/source/Minolta_Dimage_A1), a digital camera introduced in 2003
* Sony HVR-A1, the prosumer version of the [Sony HDR-HC1](/source/Sony_HDR-HC1) camcorder, which was introduced in 2005
* AVM A1-Card, an ISDN card produced by German company [AVM GmbH](/source/AVM_GmbH)
* A1 VSTi, a 2002 synthesizer software program produced by [Waldorf Music](/source/Waldorf_Music)
* [Xiaomi Mi A1](/source/Xiaomi_Mi_A1), a smartphone released in 2017, part of series Mi and Android One
* [Samsung Galaxy A01](/source/Samsung_Galaxy_A01), a smartphone released in 2020

===Mathematics===
* [A¹ homotopy theory](/source/A%C2%B9_homotopy_theory), a concept related to algebraic topology
* A1, an 1844 paper by mathematician [Hermann Grassmann](/source/Hermann_Grassmann)
* A<sub>1</sub>, the [alternating group](/source/alternating_group) on a set with one only element

=== Physics ===

* [A-1 (nuclear reactor)](/source/A-1_(nuclear_reactor)), the second Soviet reactor

===Other science and technology===
* A-1, the first series of Disney's [Audio-Animatronics](/source/Audio-Animatronics) figures
* [KS 150](/source/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](/source/International_Atomic_Time) standard
* Lely Astronaut A1, the first version of the Astronaut robot manufactured by [Lely](/source/Lely_(company))

==Sports==
===Leagues or divisions===
* [A1 sport league (disambiguation)](/source/A1_sport_league_(disambiguation))
* A1, a [climbing grade](/source/climbing_grade)
* A1, a ranking in [Keirin](/source/Keirin) track cycling
* [Class A1 (baseball)](/source/Class_A1_(baseball)), a defunct classification within Minor League Baseball

===Competitions===
* [A1 (classification)](/source/A1_(classification)), an amputee sport classification
* [A1 Grand Prix](/source/A1_Grand_Prix), a motorsport racing series
* [A-1 Liga](/source/A-1_Liga), the top basketball league in Croatia
* [HEBA A1](/source/HEBA_A1), the top basketball league in Greece
* Phase A1, a phase in a [combined driving](/source/combined_driving) equestrian competition

==Transportation==
===Aircraft===
* [List of A1 aircraft](/source/List_of_A1_aircraft)
* [A-1 (airship)](/source/A-1_(airship))
* [Douglas A-1 Skyraider](/source/Douglas_A-1_Skyraider), an American single-seat attack aircraft
* [Albastar A1](/source/Albastar_A1), a glider
* Model 3 A-1, an Aeronautical Products rotorcraft, see [List of rotorcraft](/source/List_of_rotorcraft)
* [Antigravity A1](/source/Antigravity_A1), a Chinese teleoperated quadcopter drone produced by Antigravity, a subsidiary of Insta360

===Cars===
* A1, a [tyre code](/source/tyre_code)
* [A1 Grand Prix car](/source/A1_Grand_Prix_car)
* [Anadol A1](/source/Anadol_A1), a 1966 Turkish car
* [Arrows A1](/source/Arrows_A1), a 1978 British racing car
* [Audi A1](/source/Audi_A1), a supermini automobile produced from 2010
* [Audi Quattro A1](/source/Audi_Quattro_A1), a 1983 rally car
* [Chery A1](/source/Chery_A1)
* [Scania A1](/source/Scania_A1), a 1901 car
* [Toyota A1](/source/Toyota_A1), a 1935 car prototype
* [A1 registration plate](/source/A1_registration_plate), a UK vehicle registration plate
* A1, a [Volkswagen Group A platform](/source/Volkswagen_Group_A_platform)
* A-1, a 1939 [Buick Roadmaster](/source/Buick_Roadmaster) Series 81C  used by Norwegian royalty

===Maritime===
* [A1 (shipping)](/source/A1_(shipping)), a symbol indicating shipbuilding quality
* Sea Area A1, a designation in the [Global Maritime Distress Safety System](/source/Global_Maritime_Distress_Safety_System)

====Surface vessels====
* [A-1 lifeboat](/source/A-1_lifeboat)
* [USS ''A-1''](/source/USS_A-1), several US Navy ships
* [ARA ''Comandante General Irigoyen'' (A-1)](/source/ARA_Comandante_General_Irigoyen_(A-1)), an Argentine Navy auxiliary ship

====Submarines====
* [HMS ''A1''](/source/HMS_A1), a British A-class submarine of the Royal Navy
* [Type A1 submarine](/source/Type_A1_submarine), a type of Japanese Navy submarine
* [HNoMS ''Kobben'' (A-1)](/source/HNoMS_Kobben_(A-1)), a Royal Norwegian Navy submarine

===Motorcycles===
* A1, a [Haden](/source/Haden_(motorcycle)) frame
* A1, a [Motosacoche](/source/Motosacoche) motorcycle
* A-1, a 1976 [Alligator](/source/Alligator_(motorcycle))
* Automatic A1, a [Tomos](/source/Tomos) motorcycle
* A1 Samurai, in the [list of Kawasaki motorcycles](/source/list_of_Kawasaki_motorcycles)

===Roads===
{{hatnote|See [List of A1 roads](/source/List_of_A1_roads).}}

===Spacecraft===
====Satellites====
* [A-001](/source/A-001), the second abort test of the Apollo spacecraft
* [Anik A1](/source/Anik_A1), a Canadian satellite
* [Aussat (Optus) A1](/source/Aussat_(Optus)_A1), a 1985 Australian telecommunications satellite
* [Orbcomm A1](/source/Orbcomm_A1), a 1997 American low Earth orbit communications satellite
* [Palapa A1](/source/Palapa_A1), the first 1976 Indonesian Palapa satellite
* Superbird A1, a satellite put into orbit by [an Ariane launch](/source/list_of_Ariane_launches) in 1992
* [Astérix (satellite)](/source/Ast%C3%A9rix_(satellite)) or A1, the first French satellite

====Rockets====
* A1, a model of German [Aggregate](/source/Aggregate_(rocket_family)) series rocket from World War II
* Hermes A-1, a rocket in the [Hermes project](/source/Hermes_project)
* [Saturn A-1](/source/Saturn_A-1), a 1959 American rocket
* [Scout A-1](/source/Scout_A-1), a 1965 American rocket

===Trains and public transit===
* [Bavarian A I](/source/Bavarian_A_I), an 1844 German steam locomotive model
* [LB&SCR A1 class](/source/LB%26SCR_A1_class), a class of locomotives designed by Stroudley and known as the ''Terriers''
* [LNER Gresley Classes A1 and A3](/source/LNER_Gresley_Classes_A1_and_A3), a locomotive class designed by Sir Nigel Gresley, including the ''Flying Scotsman''
* [LNER Thompson Class A1/1](/source/LNER_Thompson_Class_A1%2F1), the rebuild of 4470 ''Great Northern'' by Edward Thompson
* [LNER Peppercorn Class A1](/source/LNER_Peppercorn_Class_A1), a class of Pacific locomotives designed by Arthur Peppercorn
* [NCC Class A1](/source/NCC_Class_A1), 1901 Irish 4-4-0 passenger steam locomotives
* [Nishi-magome Station](/source/Nishi-magome_Station) (station number: A-01), a Japanese subway station
* [Pennsylvania Railroad class A1](/source/Pennsylvania_Railroad_class_A1), an American PRR steam locomotive
* [Prussian A 1](/source/Prussian_A_1), a 1907 German Prussian railbus
* RER A1, a branch of the [RER A](/source/RER_A) rapid transit line in France, to Saint-Germain-en-Laye station
* [SP&S Class A1](/source/SP%26S_Class_A1), a 1907 steam locomotives class
* [Tel Aviv–Jerusalem railway](/source/Tel_Aviv%E2%80%93Jerusalem_railway), built on the “A1 Route”
* Type A1, a type of electric [tram in Adelaide](/source/trams_in_Adelaide), Australia
* [0-2-2](/source/0-2-2) (UIC classification: A1), locomotive wheel arrangements
* [A1 (Guangzhou Metro car)](/source/A1_(Guangzhou_Metro_car)), a train model used on Guangzhou Metro Line 1

==Other uses==
* [A1 paper size](/source/A1_paper_size) (59.4×84.1 centimetres or 23.4×33.1 inches)
* [A.1. Sauce](/source/A.1._Sauce), a brand of brown sauce
* A1, a colour grade used in [shrimp marketing](/source/shrimp_marketing)
* Front of house engineer or A1, a type of [sound operator](/source/sound_operator)

==See also==
{{canned search|A1}}
* {{srt|1}}
* [A1 Ring](/source/A1_Ring), the former name for the Red Bull Ring, a motorsport circuit in Spielberg, Austria
* [1A (disambiguation)](/source/1A_(disambiguation))
* [A-1 Yola (disambiguation)](/source/A-1_Yola_(disambiguation))
* [AL (disambiguation)](/source/AL_(disambiguation))
* [Alpha 1 (disambiguation)](/source/Alpha_1_(disambiguation))
* [Aleph One (disambiguation)](/source/Aleph_One_(disambiguation))
* [A10 (disambiguation)](/source/A10_(disambiguation))
* [Jet A-1](/source/Jet_A-1), a type of aviation fuel
* {{In title}}
{{Letter-Number Combination Disambiguation}}

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Adapted from the Wikipedia article [A1](https://en.wikipedia.org/wiki/A1) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/A1?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.