| Acronym | Definition |
|---|
| STO | Store (calculator function) |
| STO | Société de Transport de l'Outaouais (French) |
| STO | Soldiers of the One (Caprica TV series) |
| STO | Slater Type Orbital |
| STO | Space Today Online (website) |
| STO | Survive to Operate (US air defense; force protection) |
| STO | Stock Transport Order |
| STO | Special Tactics Officer (US Air Force) |
| STO | Science & Technology Objective |
| STO | Space Tornado Ogawa (wrestling move) |
| STO | State and Territory Tourism Organisations (Australia) |
| STO | Strontium Titanate Oxide |
| STO | Solar Terrestrial Observatory |
| STO | Systems Test Officer (US Navy) |
| STO | Standard Transfer Order |
| STO | System Test Operations |
| STO | Sales to Order |
| STO | Southern Truck Outfitters (Alabama) |
| STO | Substitute Teachers Online |
| STO | State Traffic Officer |
| STO | Standard Training Order (military) |
| STO | Sub Task Order |
| STO | Shad Taking Over (wrestling move; Shad Gaspard) |
| STO | Statutory Tour Officer |
| STO | Student Training Officer |
| STO | Surface-to-air-missile Tactical Order |
| STO | Submarine Task Order |
| STO | Shutdown Turnaround Outages (Best Management Practices) |
| STO | Simultaneous Test and Operations (US DoD) |
| STO | Stock Transfer Order (inter-company movement of stock) |
| STO | Star Trek Online (video game) |
| STO | Saint Olaf College (Northfield, MN) |
| STO | State Tourism Organization (various locations) |
| STO | Stating the Obvious |
| STO | State Treasurer's Office (California) |
| STO | Short Takeoff |
| STO | Short-Term Observers |
| STO | Special Technical Operations |
| STO | Standard Training Operation |
| STO | Security Through Obscurity |
| STO | Sensor Technology Office (DARPA) |
| STO | Sell to Open (investing; trading) |
| STO | Scheduled Time Off |
| STO | Split Training Option |
| STO | Sports Therapy Organisation |
| STO | School Tuition Organization |
| STO | Space Tasking Order |
| STO | Service to Others |
| STO | Strategic Technology Office (DARPA) |