| Acronym | Definition |
|---|
| FSU➣Florida State University |
| FSU➣Ferris State University |
| FSU➣Fayetteville State University (North Carolina) |
| FSU➣Former Soviet Union |
| FSU➣Frostburg State University |
| FSU➣Fitchburg State University (Massachusetts) |
| FSU➣Fairmont State University (Fairmont, WV) |
| FSU➣Finance Sector Union |
| FSU➣Fédération Syndicale Unitaire (French trade union) |
| FSU➣Fast Software Upgrade |
| FSU➣Floating Subtraction |
| FSU➣Fiber Service Unit |
| FSU➣Fast Service Upgrade |
| FSU➣Financial Services Union (Australia) |
| FSU➣Floating Storage Unit |
| FSU➣Fresno State University |
| FSU➣Friends Stand United (gaming clan) |
| FSU➣Functional Spinal Unit (orthopedic testing) |
| FSU➣Fast Software Upgrade (Cisco) |
| FSU➣Food Safety Unit (various locations) |
| FSU➣Friends Stand United (Boston) |
| FSU➣Family Service Unit |
| FSU➣Free Standing Unit |
| FSU➣Fuel Sending Unit (automotive) |
| FSU➣Field Services Unit |
| FSU➣Ferry Service Unit (US Navy) |
| FSU➣Friedrich Schiller Universität of Jena (German: Friedrich Schiller University of Jena) |
| FSU➣Freeze Substitution Unit |
| FSU➣Feminist Students United |
| FSU➣Forward Support Unit |
| FSU➣Fanshawe Student Union (Fanshawe College, London, Ontario, Canada) |
| FSU➣Finance Support Unit |
| FSU➣Field Storage Unit (ammunition) |
| FSU➣Flat Side Up (fluid mechanics) |
| FSU➣File Swapping Utility |
| FSU➣Frequency Synthesizer Unit |
| FSU➣Frame Synchronization Unit |
| FSU➣Former Spousal Unit |
| FSU➣Fantasy Sports Unlimited |
| FSU➣Friends Should Unite |
| FSU➣Functional Support Unit |
| FSU➣Flight Status Update |
| FSU➣Foul Stuff Up (polite form) |
| FSU➣Fast-Spike Unit (neurobiology) |