SEL
- English Language
- Finnish Food Workers' Union
- Gimpo International Airport
- Horry County, South Carolina
- IATA Airport code
- Left Ecology Freedom
- Linux Security Modules
- Linux kernel
- Local Exchange Trading System
- Mercedes-Benz SEL
- Schweitzer Engineering Laboratories
- Search Engine Land
- Security-Enhanced Linux
- Sel (disambiguation)
- Selkirkshire
- Sensory Ethnography Lab
- Serial Experiments Lain
- Shankar–Ehsaan–Loy
- Single event upset
- Skolta Esperanto Ligo
- Social Enterprise London
- Social and Emotional Learning
- South Carolina
- Southern Evacuation Lifeline
- Standard Elektrik Lorenz
- Station of Extreme Light
- Swedish Hockey League
- Systems Engineering Laboratories