| ATRI | Advanced Transaction Routing Interface 
| Others |
| ATRI | AIDS Treatment and Research Information
| Others |
| ATRI | Alliance for Transportation Research Institute
| Others |
| ATRI | American Transportation Research Institute
| Others |
| ATRI | American Trucking Research Institute
| Others |
| ATRI | Ankerberg Theological Research Institute
| Others |
| ATRI | Aquatic and Terrestrial Resources Inventory
| Others |
| ATRI | Auto and Truck Recyclers of Illinois
| Others |