A&W, AW, Aw, aW or aw may refer to:
People
- Aw (surname), a Cantonese surname
- A. W. (wrestler), a ring name of professional wrestler and manager Brian Bary Jossie
Places
Companies
- A&W Restaurants
- AccuWeather, a private weather forecasting group
- Addison–Wesley, a publishing organisation
- Africa World Airlines, from its assigned IATA code
- AgustaWestland, helicopter design and manufacturing company based in Italy and Somerset, in the United Kingdom
- Allied Waste Industries Inc, stock symbol on NYSE
- Armstrong Whitworth, a British manufacturing company in the early 20th century
Media and entertainment
- Active Worlds, a 3D virtual reality platform
- Another World (TV series), an American soap opera
- Aviation Week, magazine
Science and technology
- aw, or Water activity, the relative availability of water in a substance
- aw, or attowatt, an SI unit of power
- .aw, the internet top level domain country code for Aruba
- Aw, categorization for tropical savanna climate in the Köppen classification system
- AW ("Antwort"), used in email subject lines as equivalent to RE (e-mail) (in German speaking countries)
- Altägyptisches Wörterbuch, the standard academic dictionary of ancient Egyptian published in Berlin
Other uses
- AW, the United States Navy hull classification symbol for "distilling ship"
- Adjusted winner procedure, a procedure used in fair division law
- Agencja Wywiadu, the Polish foreign intelligence service
- Ahnapee and Western Railway
- Arctic Warfare, a British sniper rifle made by Accuracy International
- Aviation Warfare Systems Operator, a rating in the United States Navy
- Ibanez AW Series, acoustic guitars