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 The Common European Framework of Reference for Languages: Learning, Teaching, Assessment, abbreviated in English as CEFR or CEF or CEFRL, is a guideline used to describe achievements of learners of foreign languages across Europe and, increasing ...

* 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 The ''baccalauréat'' (; ), often known in France colloquially as the ''bac'', is a French national academic qualification that students can obtain at the completion of their secondary education (at the end of the ''lycée'') by meeting certain ...

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 A secondary school leaving qualification is a document signifying that the holder has fulfilled any secondary education requirements of their locality, often including the passage of a final qualification examination. For each leaving certifica ...

, 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 Televizija (Macedonian: А1 телевизија) or just A1 was a television channel in the Republic of North Macedonia. The second privately owned commercial television station in the country (after Teko TV), it broadcast from 22 January 19 ...

A1 Report A1 News Channel (formerly TV Ballkan, A1 TV, A1 Report, and since closed) was an all news private television station in Tirana, Albania founded by media mogul Koco Kokedhima and owned by Shekulli newspaper. History A1 Report started as TV Ballka ...

, 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 ''I Love a Mystery'' is an American radio drama series that aired 1939–44, about three friends who ran a detective agency and traveled the world in search of adventure. Written by Carlton E. Morse, the program was the polar opposite of Morse's ...

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), 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 Larsen's Opening (also called the Nimzo–Larsen Attack or Queen's Fianchetto Opening) is a chess opening starting with the move: :1. b3 It is named after the Danish grandmaster Bent Larsen. Larsen was inspired by the example of the great Latv ...

, a chess move, A01 in ECO code * A1, a square on a

chessboard A chessboard is a used to play chess. It consists of 64 squares, 8 rows by 8 columns, on which the chess pieces are placed. It is square in shape and uses two colours of squares, one light and one dark, in a chequered pattern. During play, the bo ...

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 Herbert C. Abramson (November 16, 1916 – November 9, 1999) was an American record executive, record producer, and co-founder of Atlantic Records. Life and career Abramson was born in 1916 to a Jewish family in Brooklyn. He studied to be a den ...

* A-1, an American rap group behind the album Mash Confusion *

A-One (band) A-One is a mandopop group created in 2008 under the label Hong Kong Kiss-star entertainment Beijing company (香港Kiss Star娱乐北京有限公司). Names A number of names have been used for this group. * A-One (昆虫一族) * A-One (昆虫 ...

, 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 A1 x J1 (real names Phineas Waweru and Joshua Somerkun) are a British British hip hop, hip hop duo. They released their debut single "Latest Trends" in February 2021, which charted at number 2 in the UK and was remixed by Aitch (rapper), Aitc ...

, a British hip hop duo

Albums

* ''A1'', an album by

Ertuğ Ergin Ertuğ Ergin (May 18, 1970 in Adapazarı Adapazarı () is a city in northwestern Turkey and the central district of Sakarya Province. The province itself was originally named Adapazarı as well. Adapazarı is a part of the densely populated regio ...

* ''A1'', an album by Tony Cetinski * ''

A One ''A One'' is the sixteenth full-length studio album recorded by Japanese singer Ayumi Hamasaki. It was released on April 8, 2015 (exactly 17 years after her debut) by Avex Trax. It reached #4 on the Oricon charts. Background and promotion On D ...

'', an album by Ayumi Hamasaki * ''A1'' (album), a 2002 album by Norwegian band A1

Publications

* ''A1'' (comics), a comics anthology * ''

A-1 Comics ''A-1 Comics'' is a Golden Age of Comic Books, Golden Age comics publication that began in 1944 and ended in 1955, lasting 139 issues. Only the first 17 issues carried the title "A-1" on the cover. Issues #18 and up used the feature as the book tit ...

'', a 1944–1955 Golden Age comics publication * ''A1—The Great North Road'', a book by

Paul Graham (photographer) Paul Graham (born 1956) is a British fine-art and documentary photographer. He has published three survey monographs, along with 17 other publications. His work has been exhibited in the Italian Pavilion of the 49th Venice Biennale (2001), ...

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) A-1 was the designation for a code used by the United States Navy during World War I that replaced the Secret Code of 1887, SIGCODE and another system designed for radio communication. The cryptographic system was developed by Lt. W.W. Smith in th ...

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 military staff or general staff (also referred to as army staff, navy staff, or air staff within the individual services) is a group of officers, enlisted and civilian staff who serve the commander of a division or other large military u ...

* 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 This is the complete order of battle for the Battle of Crete and related operations in 1941. Allied Land forces Commonwealth & Allied Forces, Crete - "Creforce" ;Headquarters Creforce - (Eastern Zone, east of Chania) :Major-General Bernard Freyb ...

* 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 An A Visa is a category of non-immigrant visas allowing travel to the United States issued to ambassadors, diplomats, government officials, and their support staff. Types A-1 The A-1 visa is granted to many people such as ambassadors, ministers, ...

, 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 South Korean visa * A-1, a classification in the

status of Indian cities The ''classification of Indian cities'' is a ranking system used by the Government of India to allocate House Rent Allowance (HRA) to public servants employed in cities in India. HRA is also used by the Indian Revenue Service (IRS) to provide inc ...

Europe

* A1, a rank in the European Civil Service * A1, a town planning use class in England and Wales * A1, a racial classification by law enforcement in England and Wales

Places

A1 Mine Settlement, Victoria A1 Mine Settlement is a town in Victoria, Australia, located north of Woods Point on the Mansfield - Woods Point Road, in the Shire of Mansfield. The town has also been known as Castle Reef, Castle Point, and Raspberry Creek. The town began afte ...

, Australia *

Red Bull Ring The Red Bull Ring is a motorsport race track in Spielberg, Styria, Austria. The race circuit was founded as Österreichring (translation: Austrian Circuit) and hosted the Austrian Grand Prix for 18 consecutive years, from to . It was later sh ...

(formerly ''A1''), a motorsport circuit in Spielberg, Austria * List of A1 roads * Zone A1, a zone in the Greek

Alonissos Marine Park The National Marine Park of Alonnisos Northern Sporades ( el, Εθνικό Θαλάσσιο Πάρκο Αλοννήσου Βορείων Σποράδων, ΕΘΠΑΒΣ) was founded by Presidential Decree on May 16, 1992. It was the first of its ki ...

in the North Aegean Sea

Science and mathematics

Astronomy

* A1, a class of star, see

stellar classification In astronomy, stellar classification is the classification of stars based on their stellar spectrum, spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a Prism (optics), prism or diffraction grati ...

* "A1" subobject designations, including: ** NGC 3603-A1

Biology

A1 broth An A1 broth is a liquid culture medium used in microbiology for the detection of fecal coliforms in foods, treated wastewater and seawater bays using the most probable number (MPN) method. It is prepared according to the formulation of Andrews and P ...

, a substance used to detect fecal coliforms * ATC code A01 ''Stomatological preparations'', a subgroup of the Anatomical Therapeutic Chemical Classification System *

Combretastatin A1 Combretastatin A-1 is a combretastatin and a stilbenoid. It can be found in ''Combretum caffrum'', the Eastern Cape South African Bushwillow tree. Biological effects in mammals It is an antiangiogenic agent acting by destabilizing tubulin, which i ...

, a potent cytotoxic agent *

HLA-A1 HLA-A1 (A1) is a human leukocyte antigen serotype within HLA-A "A" serotype group. The serotype is determined by the antibody recognition of α1 subset of HLA-A α-chains. For A1, the alpha "A" chain are encoded by the HLA-A allele group and ...

, 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 Noradrenergic cell group A1 is a group of cells in the vicinity of the lateral reticular nucleus of the medullary reticular formation that label for norepinephrine in primates and rodents. They are found in the ventrolateral medulla The ventrolat ...

* 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 In algebraic geometry and algebraic topology, branches of mathematics, homotopy theory or motivic homotopy theory is a way to apply the techniques of algebraic topology, specifically homotopy, to algebraic varieties and, more generally, to scheme ...

, 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

, a motorsport circuit in Spielberg, Austria * A1, a

climbing grade In rock climbing, mountaineering, and other climbing disciplines, climbers give a grade to a climbing route or boulder problem, intended to describe concisely the difficulty and danger of climbing it. Different types of climbing (such as spor ...

* 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 (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 KS 150 is a Gas Cooled Reactor using Heavy Water as a moderator (GCHWR) nuclear reactor design. A single example, A-1, was constructed at the Bohunice Nuclear Power Plant in Jaslovské Bohunice, Czechoslovakia. The power plant suffered a series o ...

, 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 Acer Aspire One is a line of netbooks first released in July 2008 by Acer Inc. Many characteristics of a particular model of Acer Aspire One are dictated by the CPU platform chosen. Initial models were based on the Intel Atoms. Later, model ...

netbook computer

Commercial brands and companies

* A1 Superlink, an Australian Internet service provider merged in 2000 into the

Froggy (ISP) Froggy was an Australian business, that primarily operated an ISP amongst other things, established and owned by entrepreneur Karl Suleman. At the time of its collapse the company had around 30,000 customers. Froggy was originally two separate IS ...

* 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

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 The Sony HDR-HC1, introduced in mid-2005 (MSRP US$1999), is the first consumer HDV camcorder to support 1080i. The CMOS sensor has resolution of 1920x1440 for digital still pictures and captures video at 1440x1080 interlaced, which is the resoluti ...

camcorder, which was introduced in 2005 * AVM A1-Card, an ISDN card produced by German company

AVM GmbH AVM is a consumer electronics company founded in 1986 in Berlin, Germany. The company produces communications, networking devices such as DSL, ISDN, Wireless and VoIP products. It had sales of €580 million in 2020 with 840 employees. It is we ...

* 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) The E class of US Navy blimps comprised a single airship, built during World War I by Goodyear as one of a group of three small blimps offered to the US government. Two were purchased for the US Navy and one for the US Army. The Navy blimps were ...

* A-1 Skyraider *

Albastar A1 The Albastar A1 is a Slovenian mid-wing, T-tailed, single-seat motor glider that was designed by Pavel Potočnik and produced by Albastar Ltd.Bertrand, Noel; Rene Coulon; et al: ''World Directory of Leisure Aviation 2003-04'', page 53. Pagefast Lt ...

, glider * Model 3 A-1, an Aeronautical Products rotorcraft, see List of rotorcraft

Cars

* A1, a tyre code * A1 Grand Prix car *

Anadol A1 Anadol was Turkey's first domestic mass-production passenger vehicle company. Its first model, Anadol A1 (1966–1975) was the second Turkish car after the ill-fated Devrim sedan of 1961. Anadol cars and pick-ups were manufactured by Otosan Oto ...

, 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 In 1903, the Motor Car Act, which mandated the registration of motor vehicles, became law. It took effect on 1 January 1904, though the first number plates were issued in late 1903. The A1 registration plate was issued by London county council ...

, 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) In shipping, the designation A1 is a symbol used to denote quality of construction and material. In the various shipping registers ships are classed and given a rating after an official examination, and assigned a classification mark, which appea ...

, 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 The , also called were a trio of aircraft-carrying cruiser submarines built for the Imperial Japanese Navy (IJN) during the 1930s. All three participated in the Pacific War and were lost. Design and description The submarines of the A1 type were ...

, a type of Japanese Navy submarine * , a Royal Norwegian Navy submarine

Motorcycles

* A1, a

Haden (motorcycle) A.H. Haden Motorcycles was a British motorcycle marque from Birmingham. Haden was originally a bicycle-making business in Hockley, Birmingham, begun in the late 1880s, after the safety bicycle was introduced. The business passed from George ...

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 A-001 was the second abort test of the Apollo spacecraft. Objectives Mission A-001 was the second in the series of tests conducted to demonstrate that the launch escape system could safely remove the command module under critical abort condition ...

, 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 4 launch on 1 December 1992 * A1, a designation for the French satellite

Astérix (satellite) ''Astérix'' or A-1 (initially conceptualized as FR.2 or FR-2) is the first French satellite. It was launched on 26 November 1965 by a Diamant A rocket from the CIEES launch site at Hammaguir, Algeria. With ''Astérix'', France became the sixth ...

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 Saturn A-1, studied in 1959, was projected to be the first version of Saturn I and was to be used if necessary before the S-IV liquid hydrogen second stage became available. The first stage, proposed for the Juno V rocket, but finally used fo ...

, a 1959 American rocket *

Scout A-1 The Scout family of rockets were American launch vehicles designed to place small satellites into orbit around the Earth. The Scout multistage rocket was the first orbital launch vehicle to be entirely composed of Solid rocket, solid fuel stages. ...

, 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 Bavarian A I engines were German steam locomotives in service with the Royal Bavarian State Railways (''Königlich Bayerische Staatsbahn'') from 1841 to 1871. Three manufacturers were awarded a contract to build eight locomotives each, with the ...

, 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 LNER Class A1/1 consisted of a single 4-6-2 "Pacific" express passenger locomotive rebuilt in 1945 from an A1 class locomotive, by Edward Thompson. It was intended as the prototype of a new design of pacific locomotives improving the A4 d ...

, the rebuild of 4470 ''Great Northern'' by Edward Thompson *

LNER Peppercorn Class A1 The London and North Eastern Railway (LNER) Peppercorn Class A1 is a type of express passenger steam locomotive. Forty-nine original Peppercorn Class A1s were built to the design of Arthur Peppercorn (who was the last Chief Mechanical Engi ...

, a Pacific locomotive designed by Arthur Peppercorn *

NCC Class A1 The LMS (Northern Counties Committee) Class A1 4-4-0 passenger steam locomotives were rebuilds of Belfast and Northern Counties Railway BNCR Class A, Class A two-cylinder compound locomotives. They operated services throughout the NCC’s broa ...

, 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 This list gives an overview of the locomotives and railcars that were in the Prussian state railways. Also included are the locomotives of the Grand Duchy of Hesse State Railways (''Grossherzoglich Hessischen Staatseisenbahnen'') and the Prussia ...

, 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 Electric tram type *

0-2-2 An 0-2-2, in the Whyte notation for the classification of steam locomotives by wheel arrangement, is one that has two coupled driving wheels followed by two trailing wheels, with no leading wheels. The configuration was briefly built by Robert St ...

, the UIC classification for the Whyte notation of locomotive wheel arrangements