| Acronym | Sense | Language | Topics |
|---|---|---|---|
| FSU | Facility Security Office | In English | |
| FSU | Factor of Safety Ultimate | In English | → Accidents, risks, safety |
| FSU | Freon Servicing Unit | In English | |
| FSU | Frequency Synthesizer Unit | In English | → Telecommunications |
| FSU | Fédération Syndicale Unitaire | In French | → Organizations and associations → Labour, labour economics |
| FSU | Florida State University (www.fsu.edu) | In English | → Higher education, universities |