A3

A3 can refer to:

• A3, a paper size defined by ISO 216
• A3, a musical note, the A below Middle C
• Anytime, anywhere, anyplace, an SMS abbreviation
• A3, a German rocket design during World War II
• Alabama 3, as the United States alias of the London band. (Because of legal trademark implications, the band is known as "A3" in the United States.)
• Aegean Airways IATA code
• Audi A3, a model of automobile
• HLA-A3 is a Human MHC Serotype HLA-A
• HMS A3, a British A class submarine of the Royal Navy
• USS Grampus (SS-4), a Plunger class submarine of the United States Navy
• In town and country planning in the UK, A3 is the code for permission to use specific land or premises for restaurants and cafés.
• LNER Class A1/A3 a Pacific Locomotive Designed by Sir Nigel Gresley including the famous No 4472 Flying Scotsman
• The A3 Air Operations Branch of the UK Joint Force Air Component Hedquaters
• The A3 Champions Cup, also known as East Asian Champions Cup. A Club Football tournament for the league champions of China, Japan and South Korea
• %A3 is the Url Encoded version of the Pound symbol (£).

A-3

The variant A-3 can refer to:

• A-3 Falcon an attack aircraft manufactured by the Curtiss Aircraft Company
• A-3 Skywarrior, a strategic bomber manufactured by Douglas Aircraft Company
• Abrial A-3 Oricou, a French touring aircraft designed in 1927
• Alpha Trion, as the former name of this character from the Transformers Series
• ARITH-MATIC, as the former name for this programming language

A3 roads

There are several roads and highways with the designation A3:

• A3 (Switzerland), a motorway connecting Basel to Sargens
• A3 road (England), a trunk road connecting London to Portsmouth
• A3 road (Northern Ireland), a road in Northern Ireland connecting Lisburn to Middletown
• A3 highway (Cyprus), connecting Larnaca and Ayia Napa
• A3 highway (Portugal), connecting Porto to Braga
• A3 freeway (Romania), a freeway, currently in construction, linking Transylvania to Bucharest
• A3 Motorway (Italy), connecting Naples to Reggio Calabria
• Autovía A-3, a Spanish autovía connecting Madrid to Valencia.
• A3 (Croatia), a motorway in northern Croatia
• A3 (Slovenia), a motorway in western Slovenia
• A3, a motorway in Austria
• A3 road (Luxembourg), a motorway in southern Luxembourg
• Bundesautobahn 3 (Germany), an autobahn connecting Wesel to Passau
• Interstate A-3 an "interstate" highway in Alaska.
• Tasman Highway, a state highway in Tasmania