| Acronym | Definition |
|---|
| SEL | Select |
| SEL | Selector |
| SEL | Social and Emotional Learning |
| SEL | Selig |
| SEL | Software Engineering Laboratory |
| SEL | Schweitzer Engineering Laboratories |
| SEL | Sound Exposure Level |
| SEL | Space Environment Laboratory |
| SEL | Single-Event Latchup (of electronic circuits in space) |
| SEL | Single Engine Land (FAA pilot rating) |
| SEL | Serial Experiments Lain (anime) |
| SEL | Swedish Elite League (hockey) |
| Sel | Selian (linguistics) |
| SEL | Socioeconomic Level |
| SEL | Size Exclusion Limit ( cytology) |
| SEL | Systems Engineering Laboratories |
| SEL | School of Engineering and Logistics |
| SEL | Safety Engineering Laboratory (Los Gatos, CA) |
| SEL | Serbia Esperanto-Ligo (Serbian Esperanto Association) |
| SEL | Seoul, South Korea - Kimpo International (Airport Code) |
| SEL | Solid End Link (jewelry) |
| SEL | Scientologie Espace Librairie (Scientology bookstore, France) |
| SEL | Standard Elektronik Lorenz AG (Stuttgart, Germany) |
| SEL | Secondary Epidermal Lamellae |
| SEL | Space Environmental Monitor |
| SEL | Swedish Eliteserien |
| SEL | Special Equipment List |
| SEL | Signal Engineering Laboratories |
| SEL | SATCOM Engineering Labs |
| SEL | Selected Environmental Library |
| SEL | Skin-Effect Limit (microstrip lines) |
| SEL | System Effectiveness Level |
| SEL | Support/Selected Equipment List |
| SEL | Socket Export Layer |
| SEL | String Expression Language |
| SEL | Sony Electronics |
| SEL | Selection |
| SEL | System Event Log |
| SEL | Security Enhanced Linux |
| SEL | Software Emulation Layer |