| SEFI | Sequential Electronic Fuel Injection | 顺序电子燃油喷射 |
| SEFI | SocietÉ EuropÉenne pour la Formation des IngÉnieurs (European Society for Engineering Education) | SocietÉ EuropÉenne pour la Formation des IngÉnieurs (European Society for Engineering Education) |
| SEFI | Sustainable Energy Finance Initiative | 可持续能源融资倡议 |
| SEFI | Socio-Economic Factor Index | 社会经济因素指数 |
| SEFI | Science Education Foundation of Indiana | 印第安纳州科学教育基金会 |
| SEFI | single event functional interrupt | 单事件功能中断 |