| BART | Balloon Analogue Risk Task 
| Others |
| BART | Bandwidth Available in Real-Time
| Others |
| BART | Baronet
| Others |
| BART | Bartlett Areas Responding Task
| Others |
| BART | Basic Animal Rescue Training
| Others |
| BART | Basic Aquatic Rescue Tactics
| Others |
| BART | Bay Area Rapid Train
| Others |
| BART | Bay Area Rapid Transportation
| Others |
| BART | Bay Area Rapid2 Transit
| Others |
| BART | Bayesian Additive Regression Trees
| Others |
| BART | Beagles Are Really Terriffic
| Others |
| BART | Belle Air Residents For Truth
| Others |
| BART | Benchmark for Animated Ray Tracing
| Others |
| BART | Berkeley Advanced Reconstruction Toolbox
| Others |
| BART | Best Achievable Retrofit Technology
| Others |
| BART | Best Available Retrofit Technology
| Others |
| BART | Biblical Analysis and Research Tool
| Others |
| BART | Biblical Analysis Research Tool
| Others |
| BART | Big A** Red Thing
| Others |
| BART | Big A** Red Truck
| Others |
| BART | Big Astronomical Reflecting Telescope
| Others |
| BART | Biological Activity Reaction Test
| Others |
| BART | Biosphere Atmosphere Research and Training
| Others |
| BART | Bootable Antivirus and Recovery Tools
| Others |
| BART | Budget, Authority, Responsibility, Timeline
| Others |
| BART | Bureau Area Rural Transit
| Others |
| BART | Business Aviation Real Tool
| Others |