| TESS | Tactical Engagement Simulation System 
| Others |
| TESS | Tactical Environment Support System
| Others |
| TESS | Tactical Environmental Support System
| Others |
| TESS | Talladega Electrical Service and Supply
| Others |
| TESS | Teacher Evaluation and Support System
| Others |
| TESS | Teacher Excellence and Support System
| Others |
| TESS | Teacher Excellence and Support System - Arkansas Teacher Evaluation
| Others |
| TESS | Teaching Empathy Saving Species
| Others |
| TESS | Teaching English Support Service
| Others |
| TESS | Team Efficiency Stability Success
| Others |
| TESS | Technology, English, and Social Studies
| Others |
| TESS | Temporary Early Sleep Station
| Others |
| TESS | Texas Excavation Safety System
| Others |
| TESS | The Elite Saiyan Squad
| Others |
| TESS | The Endless Summer Song
| Others |
| TESS | the Exponential Encryption System
| Others |
| TESS | Toronto Employment and Social Services
| Others |
| TESS | Total Enterprise Security Service
| Others |
| TESS | Toxic Exposure Surveillance System
| Others |
| TESS | Toyota Enterprise Security Services
| Others |
| TESS | Trademark Electronic Search System
| Others |
| TESS | Transcription Element Search System
| Others |
| TESS | Transiting Exoplanet Survey Satellite
| Others |
| TESS | Treatment Emergent Signs and Symptoms
| Others |
| TESS | Treatment Emergent Symptoms Scale
| Others |
| TESS | Triennial Earth Sun Summit
| Others |
| TESS | Tsuneishi Economical Standard Ship
| Others |