| Acronym | Definition |
|---|
| SEPO | Student Environmental Protection Organization |
| SEPO | Software Engineering Process Office (now called Systems Engineering Process Office; SSC San Diego) |
| SEPO | Systems Engineering Process Office |
| SEPO | Senior Emergency Planning Officer |
| SEPO | St. Edmunds Property Owners (est. 1975; Canada) |
| SEPO | SSI (Solid State Imaging) Education and Public Outreach (Galileo spacecraft mission; US NASA) |
| SEPO | Support Equipment Project Officer |
