| Abbreviation | Definition |
|---|---|
| SERT | Self Erecting Rifle Targets |
| SERT | Special Emergency Response Team |
| SES | Senior Executive Service |
| SES | Socioeconomic Status |
| SES | Special Elite Soldiers |
| SES | Suicide Euro Squad |
| SESAME | Selected Essential Item Stock for Availability Method Model |
| SESAME | Selected Essential Stockage Availability Method |
| SESD | Space Electronic Security Division |
| SET | System Engineering Testbed |
| SETA | System Engineering and Technical Assistance |
| SETA | System Engineering Technical Assistance |
| SETAF | Southern European Task Force |
| SETH | Simulation Equipment Test Hardware |
| SETM | Senior Enterprise Talent Management |
| SETT | Submarine Escape Training Tank |
| SETT | Systems Extension Training Team |
| SETTER | Sensor Fusion for SHORADS |
| SEV | Several |
| SEV | Severance Pay |