ART
- ART (sculpture)
- ART Grand Prix
- ART Teenz
- ART Television (Sri Lanka)
- ART image file format
- ARTS (disambiguation)
- Absolute reaction rate theory
- Acoustic resonance technology
- Adaptive resonance theory
- Administrative Review Tribunal
- Aggression replacement training
- Albuquerque Rapid Transit
- Algebraic Reconstruction Technique
- Alternative risk transfer
- American Refrigerator Transit Company
- American Repertory Theater
- Anaheim Resort Transportation
- Androgen replacement therapy
- Android Runtime
- Anti-retroviral therapy
- Aprilia
- Arab Radio and Television Network
- Ararat railway station
- Argentina Time
- Arlington Transit
- Arrochar and Tarbet railway station
- Art (disambiguation)
- Art (given name)
- Art line (disambiguation)
- Artificial languages
- Artists Repertory Theatre
- Ashokan Rail Trail
- Asia Racing Team
- Assisted reproductive technology
- Athlete Refugee Team
- Attention restoration theory
- Autonomous Rail Rapid Transit
- Avatar Repertory Theater
- Bombardier Advanced Rapid Transit
- Watertown International Airport