| Abbreviation | Definition |
|---|---|
| PSE | Programming Support Environment |
| PSE | Psychological Operations Support Element |
| PSE | Pull Shoot Explode |
| PSEB | Patrick Stewart Estrogen Brigade |
| PSER | Personnel Status and Effectiveness Report |
| PSF | Payload Signaling Field |
| PSF | Polvere Sensa Fumo (Smokeless Powder) |
| PSF | Process Support Facilities |
| PSFIS | Phoenix Supply Financial Interface System |
| PSFREP | Post-Summer Faculty Research and Engineering Program |
| PSG | Personal Shield Generator |
| PSG | Personnel Support Group |
| PSG | Presidential Security Group |
| PSHA | Preliminary Safety Hazard Analysis |
| PSHDGRU | Port Security and Harbor Defense Group |
| PSI | Personnel Security Investigation |
| PSI | Pounds per Square Inch |
| PSI | Proliferation Security Initiative |
| PSI | Proliferation Security Initiative Psi Pounds Per Square Inch |
| PSID | Program Support Integration Directorate |