| Abbreviation | Definition |
|---|---|
| RSE | Reverse Screw Element |
| RSE | Richmond So Engineers |
| RSE | Robert Semple Elementary |
| RSE | Robots In Service of the Environment |
| RSE | Robust Standard Error |
| RSE | Rock Springs Elementary |
| RSE | Ruby Sapphire and Emerald |
| RSE | Ruby Sapphire Emerald |
| RSE | Runyon Saltzman Einhorn |
| RSEA | Regionally significant ecological areas |
| RSEC | Radiation Science and Engineering Center |
| RSEC | Recording Standards and Ethics Committee |
| RSEC | Red Sea Environmental Center |
| RSEC | Red Sea Environmental Centre |
| RSEC | Regional Services and Education Center |
| RSEC | Regional Services Education Center |
| RSEC | Regional Special Events Center |
| RSEC | Research on Social and Educational Change |
| RSEC | Retirement Savings Education Campaign |
| RSEC | Rising Sun Energy Center |