| Acronym | Definition |
|---|
| ATOS | American Theatre Organ Society |
| ATOS | Air Transportation Oversight System |
| ATOS | Atari Operating System |
| ATOS | Autonomous Decentralized Transport Operation Control System (Japan) |
| ATOS | Australian Treatment Outcome Study (National Drug & Alcohol Research Center) |
| ATOS | Assessment at Time of Sale |
| ATOS | Advanced Topometric Sensor |
| ATOS | Automated Technical Order System |
| ATOS | Advanced Technology Ordnance Surveillance |
| ATOS | Advantage/TASA Open Standard (reading management software offered jointly by Advantage Learning Systems and Touchstone Applied Science Associates) |
| ATOS | Air Traffic Operations Service |
| ATOS | Automated Travel Order System |
| ATOS | Aircraft Tape Operating system |
| ATOS | ASWOC Tape Operation System |
| ATOS | Administratif, Technicien, Ouvrier et de Service (French: Administrative Staff, Technicians, and Service Workers) |
| ATOS | Assisted Takeoff System |
