| Acronym | Sense | Language | Topics |
|---|---|---|---|
| SEM | SEmantic Memory | In English | → Software → Semiotics |
| SEM | Space Environment Monitor | In English | |
| SEM | Service d'Économie Maritime | In French | → Economics → Marine research, oceanography → Fishing, hunting |
| SEM | Société d'Économie Mixte | In French | → Economics → Public administration, government |
| SEM | Scanning Electron Microscope | In English | |
| SEM | Seller's Engineering Memo | In English | |
| SEM | Shuttle Experiment Module | In English | → Astronautics |
| SEM | Space Environment Monitoring | In English | → Astronomy → Astronautics |
| SEM | Subcontractor Engineering Memorandum | In English | → Contract law |
| SEM | System Engineering Management | In English | → Engineering, technology |