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

Arts and entertainment

Film

* ''

A-1 Headline ''A-1'' (), known internationally as ''A-1 Headline'', is a 2004 Hong Kong thriller film written and directed by Gordon Chan and Rico Chung and starring Anthony Wong (Hong Kong actor), Anthony Wong, Angelica Lee, Edison Chen, with a special app ...

'', a 2004 Hong Kong film * (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 A chessboard is a game board 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 p ...

Music and dance

* A1, a part in

contra dance choreography :''This article supplements the main Contra dance article.'' Contra dance choreography specifies the Contra dance form, dance formation, the Dance move, figures, and the sequence of those figures in a contra dance. The figures repeat, ideally, in ...

* A-1 Sound Studios, a recording studio owned by

Herb Abramson Herbert Charles 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 ...

* 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 Ertuğ Ergin (May 18, 1970 in Adapazarı Adapazarı () is a municipality and the capital Districts of Turkey, district of Sakarya Province, Turkey. Its area is 324 km2, and its population 281,489 (2022). It covers the central and northern part ...

* ''A1'', an album by

Tony Cetinski Anthony Cetinski (born 31 May 1969) is a Croatian pop singer. Biography Born into a family of musicians in Pula (then SR Croatia, SFR Yugoslavia), Cetinski began singing when he was 15 years old with various local groups. He moved from Rovinj to ...

* '' A One'', an album by Ayumi Hamasaki * ''A1'' (album), a 2002 album by the British–Norwegian band A1

Radio

CHIN (AM) CHIN (1540 kHz) is a commercial broadcasting, commercial AM broadcasting, AM radio station in Toronto, Ontario, Canada. It is owned by CHIN Radio/TV International, and broadcasts a multilingual radio format. It formerly utilized an FM broadcastin ...

(promotional name: A1), a station in Canada * A1, a Slovenian radio network owned by

Radiotelevizija Slovenija Radiotelevizija Slovenija () – usually abbreviated to RTV Slovenija, RTV SLO (or simply RTV within Slovenia) – is Slovenia's national public broadcasting organization. Based in Ljubljana, it has regional broadcasting centres in Koper and Ma ...

* 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-1 Comics'' is a 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 title with different numberin ...

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

Television

A-One (TV channel) A-One Hip-Hop Music Channel was a Russian music television channel broadcasting hip hop music. The channel was broadcast on the satellite ABS-2 (FTA), on the "Tricolor TV" platform, and in 850 cable packages. History After briefly being known ...

, a Russian music channel *

A1 Televizija A1 Televizija ( Macedonian: А1 телевизија) or just A1 was a television channel in North Macedonia. The second privately owned commercial television station in the country (after TEKO TV), it broadcast from 22 January 1993 to 31 Ju ...

, a former channel in the Republic of North Macedonia *

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 Albania ( ; or ), officially the Republic of Albania (), is a country in Southeast Europe. It is lo ...

, a television station in Albania *

America One America One was an American television network established in 1995 by USFR Media Group through its America One Television subsidiary.

, an American television network

Companies

A1 Film Company A1 Film Company is a Burmese-owned cinema company. The company was awarded to the Myanmar Motion Picture Academy Awards. It produced the 1940 film '' Chit Yay Sin'' and 1935 '' Japan Yin Thwe''. Key actors * Tin Maung Tin Maung ( ; 7 Augus ...

, a Burmese cinema company *

A-1 Pictures is a Japanese animation studio and production company founded by ex- Sunrise producer Mikihiro Iwata. It is a subsidiary of Sony Music Entertainment Japan's anime production firm Aniplex. History The company was established by SMEJ's animat ...

, a Japanese animation studio *

A1 Games A1, A-1, A01 or A.1. may refer to: Arts and entertainment Film * ''A-1 Headline'', a 2004 Hong Kong film * (English title: ''Our Man in Jamaica''), a 1965 Italian film * ''A1'', a 1999 Syrian film; see List of Syrian films * ''A1'' (2019 film) ...

, an American video game publisher for the PlayStation; see

List of PlayStation games (A–L) List of PlayStation games may refer to: * List of PlayStation (console) video games: ** List of PlayStation (console) games (A–L) ** List of PlayStation (console) games (M–Z) * List of video games for other Sony PlayStation consoles: ** Lis ...

* 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 A1 Telekom Austria (A1, ''A eins'') is the leading fixed and mobile network operator in Austria, with 5.4 million mobile and 2.3 million fixed-line customers. A1 Telekom Austria traces its origins to Austria's first GSM mobile phone network wh ...

, 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 A1 Macedonia DOOEL Skopje is a telecommunications company in North Macedonia owned by A1 Telekom Austria Group. A1 offers broadband internet, cable and terrestrial television, mobile telephony and landline. History Vip Macedonia (then known a ...

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

* Language A1, the former name for "Language A: literature", one of the

IB Group 1 subjects The Group 1: Studies in language and literature (previously First Language) subjects of the IB Diploma Programme refer to the student's first language (native language or otherwise best language). Three courses are available: ''Language A: liter ...

* 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 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 Education in Nigeria is overseen by the Federal Ministry of Education. The local authorities take responsibility for implementing state-controlled policy regarding public education and state schools. The education system is divided into Kinde ...

* A1, a grade for the

Singapore-Cambridge GCE Ordinary Level The Singapore-Cambridge General Certificate of Education Ordinary Level (or Singapore-Cambridge GCE O-Level) is a GCE Ordinary Level examination held annually in Singapore and is jointly conducted by the Ministry of Education (MOE), Singapore Ex ...

, 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 Compagnie Française d'Assurance pour le Commerce Extérieur (Coface) is a Trade credit insurance, credit insurer that operates worldwide' in addition to offering debt collection services, factoring and business information, and bonds. Creat ...

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 The Svea Artillery Regiment (), designation A 1, was a Swedish Army artillery regiment that traced its origins back to the 17th century. It was disbanded in 1997. The regiment's soldiers were originally recruited from Svealand, and it was also gar ...

, 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 The AMX International AMX is a ground-attack aircraft jointly developed by Brazil and Italy. The AMX is designated A-11 Ghibli by the Italian Air Force and A-1 by the Brazilian Air Force. The Italian name, "Ghibli", is taken from the hot dry wi ...

(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 * A-One (graffiti artist) (born 1964) American graffiti artist

Politics and government

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, ministe ...

, 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 The European Civil Service is a generic term applied to all staff serving the institutions and agencies of the European Union (EU). Although recruitment is sometimes done jointly, each institution is responsible for its own internal structures ...

* 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 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 gratin ...

* 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 auditory cortex is the part of the temporal lobe that processes auditory information in humans and many other vertebrates. It is a part of the auditory system, performing basic and higher functions in hearing, such as possible relations to ...

, 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 anterior cerebral artery (ACA) is one of a pair of cerebral arteries that supplies oxygenated blood to most midline portions of the frontal lobes and superior medial parietal lobes of the brain. The two anterior cerebral arteries arise from th ...

* A1, 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 in conjunct ...

* A1, a mating type of ''

Phytophthora infestans ''Phytophthora infestans'' is an oomycete or Oomycete, water mold, a fungus-like microorganism that causes the serious potato and tomato disease known as late blight or potato blight. Early blight, caused by ''Alternaria solani'', is also often c ...

'', the cause of potato blight

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 Trusted Computer System Evaluation Criteria (TCSEC) is a United States Government Department of Defense (DoD) standard that sets basic requirements for assessing the effectiveness of computer security controls built into a computer system. The TC ...

Acer Aspire One Acer Aspire One is a line of netbooks and laptops 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 are based on Intel Atoms. Later, ...

, a netbook computer

Earth sciences

* A1, a

landslide classification There have been known various classifications of landslides. Broad definitions include forms of mass movement (geology), mass movement that narrower definitions exclude. For example, the ''McGraw-Hill Encyclopedia of Science and Technology'' distin ...

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

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 introduced in 2003 * Sony HVR-A1, the prosumer version of the

Sony HDR-HC1 The Sony HDR-HC1, introduced in mid-2005 (suggested retail price, 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 interlac ...

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

AVM GmbH AVM, acronym for Audio Visual Marketing, 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 €620 million ...

* A1 VSTi, a 2002 synthesizer software program produced by

Waldorf Music Waldorf Music is a German synthesizer company best known for its Waldorf Microwave, Microwave wavetable synthesis, wavetable synthesizer and Waldorf Blofeld, Blofeld virtual analogue synthesizer. History Waldorf Electronics GmbH was founded i ...

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

Mathematics

* A¹ homotopy theory, a concept related to algebraic topology * A1, an 1844 paper by mathematician

Hermann Grassmann Hermann Günther Grassmann (, ; 15 April 1809 – 26 September 1877) was a German polymath known in his day as a linguist and now also as a mathematician. He was also a physicist, general scholar, and publisher. His mathematical work was littl ...

* A₁, the

alternating group In mathematics, an alternating group is the Group (mathematics), group of even permutations of a finite set. The alternating group on a set of elements is called the alternating group of degree , or the alternating group on letters and denoted ...

on a set with one only element

Physics

A-1 (nuclear reactor) The A-1 nuclear reactor was the first Soviet Union, Soviet plutonium production reactor, built and operated at the Mayak Production Association from 1948 for the Soviet atomic bomb project. It was affectionately named "Annushka" by project scien ...

, the second Soviet reactor

Other science and technology

* A-1, the first series of Disney's

Audio-Animatronics Audio-Animatronics (also known simply as AAs) are a form of Mechatronics, mechatronic animatronics puppetry created by Walt Disney Imagineering and Trademark, trademarked by The Walt Disney Company for use in designed shows and attractions at Disn ...

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 International Atomic Time (abbreviated TAI, from its French name ) is a high-precision atomic coordinate time standard based on the notional passage of proper time on Earth's geoid. TAI is a weighted average of the time kept by over 450 atomi ...

standard

Sports

Leagues or divisions

* A1 sport league (disambiguation) * A1, a

climbing grade Many climbing routes have grades for the technical difficulty, and in some cases for the risks, of the route. The first ascensionist can suggest a grade but it will be amended for the ''consensus view'' of subsequent ascents. While many cou ...

* A1, a ranking in

Keirin – "racing track" – is a form of Motor-paced racing, motor-paced cycle racing in which track cycling, track cyclists sprint for victory following a speed-controlled start behind a motorized or non-motorized pacer. It was developed in Japan ...

track cycling *

Class A1 (baseball) Minor League Baseball (MiLB) is a professional baseball organization below Major League Baseball (MLB), constituted of teams affiliated with MLB clubs. It was founded on September 5, 1901, in response to the growing dominance of the National Le ...

, a defunct classification within Minor League Baseball

Competitions

* A1 (classification), an amputee sport classification *

A1 Grand Prix A1 Grand Prix Operations Ltd. operated as A1 Grand Prix (A1GP) was a "single-make" open-wheel auto racing series that ran from 2005 until 2009. It was unique in its field in that competitors solely represented their nation as opposed to themse ...

, a motorsport racing series *

A-1 Liga The Favbet Premijer liga (, ), also known as simply Premijer liga, is the first tier level men's professional basketball league in Croatia. It began in 1991, following the breakup of SFR Yugoslavia and therefore the Yugoslav League, and is or ...

, the top basketball league in Croatia *

HEBA A1 The Greek Basketball League (GBL), and also known as the Stoiximan Greek Basketball League (GBL) for sponsorship reasons, is the first tier level professional basketball league in Greece. It is run by the Hellenic Basketball Associat ...

, the top basketball league in Greece * Phase A1, a phase in a

combined driving Combined driving (also known as horse driving trials) is an equestrian sport involving driving (horse), carriage driving. In this discipline, the driver sits on a vehicle drawn by a single horse, a pair or a team of four. The sport has three p ...

equestrian competition

Transportation

Aircraft

* List of A1 aircraft * A-1 (airship) *

Douglas A-1 Skyraider The Douglas A-1 Skyraider (formerly designated AD before the 1962 1962 United States Tri-Service aircraft designation system, unification of Navy and Air Force designations) is an American single-seat attack aircraft in service from 1946 to the ...

* Albastar A1, a glider * Model 3 A-1, an Aeronautical Products rotorcraft, see

List of rotorcraft This is a list of rotorcraft, including helicopters, autogyros, rotor kites and convertiplanes. A A-B Helicopters * A-B Helicopters A/W 95 Aero *Aero HC-2 Heli Baby Aero-Astra * Aero-Astra Okhotnik 1 Aero Eli Serviza * Aero E ...

Cars

* A1, a tyre code *

A1 Grand Prix car The Lola A1GP was a vehicle designed to compete in the A1 Grand Prix. The car was standardised for every team to provide a level playing field for competing nations. It was designed to reduce the volume of "dirty air", allowing drivers to close ...

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

, 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 The A1 was the first prototype passenger car built by the company that became Toyota. It was redesigned and put into production as Toyota's first production cars, the AA sedan and the AB cabriolet. These were succeeded by the similar AE, AC and ...

, a 1935 car prototype * A1 registration plate, a UK vehicle registration plate * A1, a

Volkswagen Group A platform The Volkswagen Group A platform is an automobile platform shared among compact car, compact and mid-size cars of the Volkswagen Group. The first version debuted in 1974 and was originally based on the engineering concept of the Volkswagen Golf Mk1 ...

* A-1, a 1939

Buick Roadmaster The Buick Roadmaster is an automobile built by Buick from 1936 until 1942, from 1946 until 1958, and then again from 1991 until 1996. Roadmasters produced between 1936 and 1958 were built on Buick's longest non-limousine wheelbase and shared the ...

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 The Global Maritime Distress and Safety System (GMDSS) is a worldwide system for automated emergency signal communication for ships at sea developed by the United Nations' International Maritime Organization (IMO) as part of the SOLAS Convention. ...

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 Motosacoche was founded in 1899, by Henri and Armand Dufaux, in Geneva, Switzerland. Motosacoche was once the biggest Swiss motorcycle manufacturer, known also for its MAG (Motosacoche Acacias Genève) engines, used by other European motorcycle m ...

motorcycle * A-1, a 1976

Alligator An alligator, or colloquially gator, is a large reptile in the genus ''Alligator'' of the Family (biology), family Alligatoridae in the Order (biology), order Crocodilia. The two Extant taxon, extant species are the American alligator (''A. mis ...

* Automatic A1, a Tomos motorcycle * A1 Samurai, in the

list of Kawasaki motorcycles This is a list of Kawasaki motorcycles designed and/or manufactured by Kawasaki Heavy Industries Motorcycle & Engine and its predecessors. Special purpose * Kawasaki police motorcycles Cruiser * Vulcan 2000 * Kawasaki Vulcan 1700 Classic/Classi ...

Roads

List of A1 roads A list of road designation, roads designated A1 (disambiguation), A1, sorted by alphabetical order of country. * A01 highway (Afghanistan), a long ring road or beltway connecting Kabul, Kandahar, Herat and Mazar * A1 motorway (Albania), connecti ...

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 Hermes2D (''Higher-order modular finite element system'') is a C++/Python library of algorithms for rapid development of adaptive hp-FEM solvers. hp-FEM is a modern version of the finite element method (FEM) that is capable of extremely fast, exp ...

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. It was designed as a three stage vehicle. The S-I first stage (in ...

, a 1959 American rocket * Scout A-1, a 1965 American rocket

Trains and public transit

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 s ...

, an 1844 German steam locomotive model *

LB&SCR A1 class The London, Brighton and South Coast Railway (LB&SCR) A1 class is a class of British steam locomotive. Designed by William Stroudley, 50 members of the class were built in 1872 and between 1874 and 1880, all at Brighton railway works. The class ...

, a class of locomotives designed by Stroudley and known as the ''Terriers'' *

LNER Gresley Classes A1 and A3 The London and North Eastern Railway Gresley Classes A1 and A3 were "Pacific" steam locomotives designed by Nigel Gresley for passenger work. They were initially intended for use on the Great Northern Railway (Great Britain), Great Northern Ra ...

, 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 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 bro ...

, 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 RER A is one of the five lines in the Réseau Express Régional (English: Regional Express Network), a hybrid commuter rail and rapid transit system serving the city and suburbs of Paris Paris () is the Capital city, capital and List o ...

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 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 Robe ...

(UIC classification: A1), locomotive wheel arrangements * A1, a train model uses in

Guangzhou Metro The Guangzhou Metro ( zh, s=广州地铁, labels=no) is the rapid transit system of the city of Guangzhou in the Guangdong Province of China. It is operated by the state-owned Guangzhou Metro Corporation and was the fourth metro system to be b ...

Other uses

A1 paper size ISO 216 is an International Organization for Standardization, international standard for paper sizes, used around the world except in North America and parts of Latin America. The standard defines the "A", "B" and "C" series of paper sizes, wh ...

(59.4×84.1 centimetres or 23.4×33.1 inches) * A.1. Sauce, a brand of brown sauce * A1, a colour grade used in shrimp marketing * Front of house engineer or A1, a type of

sound operator An audio engineer (also known as a sound engineer or recording engineer) helps to produce a recording or a live performance, balancing and adjusting sound sources using equalization, dynamics processing and audio effects, mixing, reproduct ...