A1 (TV channel), a television channel in Macedonia
America One, a television network in the United States, successor to Channel America
A1, nickname for fictional character Battle Angel Alita, as her nickname on Tuned days
A1, or Adventure One, a TV channel now known as National Geographic Adventure or "Nat Geo Adventure"
A.I. Artificial Intelligence, a 2001 science fiction film
A.I Company, a Japanese developper of the 1990 Wrath of the Black Manta video game
Commercial products
Canon A-1, a camera by Canon, manufactured from 1978-1985
A1 Steak Sauce, a brand of condiment
Sports
A1 Grand Prix series
A1 Ethniki, the top Greek basketball league
A1 Volleyball, a Greek volleyball league
A 1 (Italian Volleyball League), a category in the Italian Volleyball League
A1 Ring, the Österreichring race track at which the Austrian Grand Prix was run
A1, a stage name for Alastair Ralphs (b. 1977), professional wrestler
Transportation
=Aircrafts
=
A-1 Skyraider, a United States Air Force/Navy single-seat attack bomber
Alter A.1, a 1917 German single-seat biplane fighter aircraft
Ansaldo A.1 Balilla, a 1917 Italian fighter aircraft
Arpin A-1, a 1938 unorthodox monoplane aircraft
Fokker A.I, a 1910s German two-seat observation aircraft
Gotha A.I, a German 1910 Rumpler Taube model
aircraft
=Cars
=
Audi A1, super-mini automobile to be released in 2009
Chery A1, a 2007 Chinese Chery Automobile model
=Railway
=
Bavarian A I, a 1844 German steam locomotive model
LB&SCR A1 class, a class of locomotices designed by Stroudley and known as the ''Terriers''
LNER Class A1/A3,a locomotive designed by Sir Nigel Gresley,including the famous ''Flying Scotsman''
LNER Peppercorn Class A1, a Pacific locomotive designed by A. H. Peppercorn
Prussian A 1, a 1907 German Prussian railbus
SP&S Class A1, a 1907 steam locomotives class
Plan A1, the codename for the high-speed railway to Jerusalem
the UIC classification for 0-2-2 the Whyte notation for railway locomotive wheel arrangements
=Shipping
=
A1 (shipping), a symbol indicating shipbuilding quality
HMS ''A1'', a British A class submarine of the Royal Navy
USS ''A-1'', multiple US Navy ships
=A1 roads
=<!-- This section is linked from A1 road -->
; motorways :
A1 is the designation for the majority of the Highway 1 route in Australia.
A1 Westautobahn, a motorway in Austria
A1 (Bosnia and Herzegovina), a highway that carries Corridor Vc
A1 autoroute (France)
A1 highway (Croatia), connecting the capital Zagreb to the second largest city located in Dalmatia, Split and continues on to Dubrovnik (finished up to Šestanovac)
A1 highway (Kenya), a long road in Kenya from Tanzanian to Sudanese border
A1 highway (Lithuania), connecting Vilnius to Klaipėda
A1 motorway (Cyprus), connecting Nicosia to Limassol
A1 Motorway (Italy), connecting Milan to Naples
A1 motorway (Netherlands), connecting Amsterdam to Enschede and further on to Germany (direction Osnabrück)
A1 motorway (Romania), connecting Bucharest to Piteşti
A1 motorway (Slovenia), connecting Maribor to Koper via Ljubljana
A1 motorway (Switzerland), connecting St. Margrethen to Geneva
Autostrada A1 (Poland) - planned highway that will span Poland from north to south.
A1 - Auto-estrada do Norte, in Portugal, connecting Lisbon and Porto
Autovía A-1, a Spanish autovía connecting Madrid to Irún (French border)
Interstate A-1 in Alaska
Bundesautobahn 1 (Germany), connecting Oldenburg (Holstein) to Saarbrücken
Trakiya motorway in Bulgaria, carrying the code A1, connecting Sofia and Burgas via Plovdiv
; roads :
A001, Ruta Nacional A001 (Argentina)
A1 road (Belgium), connecting Brussels, Antwerp to Breda
A1 road (Great Britain), a key artery connecting London to Edinburgh, and many towns and cities in between. See A1 road (London) for the London sections of the road
A1 road (Isle of Man), connecting Douglas and Peel
A1 road (Luxembourg), connecting Luxembourg City to the German A64
A1 road (Northern Ireland), connecting Belfast to Newry and to Dublin in the Republic of Ireland via the N1/M1.
A1 road (Sri Lanka), a trunk road connecting the capital city of Colombo to Kandy
A1 road (Zimbabwe), a National Route in Zimbabwe between Masvingo and Beitbridge
National Road 1A (Vietnam), connecting the northernmost and southernmost areas of the country
Biology
A1 broth, a substance used in microbiology used to detect fecal coliforms
Adenosine A1 receptor
Annexin A1
Apolipoprotein A1
HLA-A1, a Human MHC genetic Serotype
Phospholipase A1, an enzyme
Other uses
A1, a computer security class
A1 Mine Settlement, Victoria, a town in Victoria, Australia
A1 (star), a massive binary star system located in NGC 3603
Company A-1, an outfit in the Texas A&M Corps of Cadets
A1, a German rocket design in the Aggregate series from the 1930s
A1, a theater term for a sound operator
A1 Company, a company in Hong Kong
A1, a code-name for the Microsoft security service Windows Live OneCare
A1, the paper size and type ISO 216
A1, a level in the Common European Framework of Reference for Languages
A1, a recovery business based in Merseyside
A1, the designation for air force headquarters staff concerned with personnel and administration
A 1, Svea artilleriregemente designation, a former Swedish Army artillery regiment
A01, Encyclopaedia of Chess Openings code for Larsen's Opening
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