| Acronym | Definition |
|---|
| ATU➣Auto Teile Unger (German auto parts company) |
| ATU➣Arkansas Tech University |
| ATU➣Amalgamated Transit Union |
| ATU➣ACORN (Association of Community Organizations for Reform Now) Tenants Union |
| ATU➣African Telecommunications Union |
| ATU➣Actuant Corporation (stock symbol) |
| ATU➣Across the Universe (Beatles song and 2007 movie) |
| ATU➣Autorisation Temporaire d'Utilisation (French: Temporary Use Authorization; pharmacology) |
| ATU➣Adsl Transceiver Unit |
| ATU➣Antenna Tuning Unit |
| ATU➣ADSL Transceiver Unit (ITU-T) |
| ATU➣Aerobic Treatment Unit |
| ATU➣Aquatic Therapy University (Plymouth, MN) |
| ATU➣Agrobacterium Tumefaciens |
| ATU➣Amphibious Task Unit (joint military training project; Finland and Sweden) |
| ATU➣ADSL Terminal Unit |
| ATU➣Address Translation Unit |
| ATU➣Abstract Tribe Unique (hip hop) |
| ATU➣Alcohol Tax Unit |
| ATU➣AIDS Treatment Update |
| ATU➣Anchorage Telephone Utility |
| ATU➣Advanced Training Unit (US Navy) |
| ATU➣Audio Terminal Unit |
| ATU➣Automatic Tuning Unit |
| ATU➣Antiterrorist Unit |
| ATU➣Awareness, Trial and Usage |
| ATU➣Acute Treatment Unit |
| ATU➣Asian Taekwondo Union |
| ATU➣Advanced Tactical Unit (gaming) |
| ATU➣Albergues de Transicion Unifamiliar (Spanish: Family Transition Shelters; Guatemala) |
| ATU➣account team unit (UK) |
| ATU➣Approaching the Unreal (Rock Band players' group; Australia) |
| ATU➣Appalachian Terror Unit (band) |
| ATU➣Accumulated Thermal Unit |
| ATU➣Air Terminal Unit (HVAC) |
| ATU➣Auto Trac Universal (John Deere assisted steering system) |
| ATU➣Actions Transports Urgents (French: Urgent Action Transport) |
| ATU➣Administrative Target Unit |
| ATU➣Automatic Tray Unsleever (US postal Service) |
| ATU➣All Terrain Unicycle |
| ATU➣Automatic Top-Up (Virgin Mobile USA) |
| ATU➣Agency Terminal Unit |
| ATU➣American Tippler Union |
| ATU➣Alarm Transfer Unit |
| ATU➣Auxiliary Test Unit |
| ATU➣Analog Test Unit |
| ATU➣Amplifier Test/Technology Unit |
| ATU➣Automated Tracking Unit |
| ATU➣Analog Trip Unit |
| ATU➣Audio Tape Unit |
| ATU➣Application Terminal Unit |
| ATU➣Automatic Testing Unit |
| ATU➣AUTODIN Transfer Unit |
| ATU➣Army Test Unit |
| ATU➣Arizona Treasures Unlimited, Inc. (Phoenix, AZ) |
| ATU➣Automated Timing Unit |
| ATU➣Automated Translation Unit |
| ATU➣All Things Ukrainian, Inc (North Carolina importer) |