FSU
- California State University, Fresno
- Fairmont State University
- Fayetteville State University
- Ferris State University
- Finance Sector Union
- Financial Services Union
- Fitchburg State University
- Floating storage unit
- Florida State University
- Former Soviet Union
- Framingham State University
- Free Speech Union
- Friends Stand United
- Frostburg State University
- Fuse (electrical)
- Fédération Syndicale Unitaire
- University of Jena