4F
4F or 4-F may refer to: 4F (company), a Polish sportswear company 4-F classification in the U.S. Selective Service System, identifying a person as unfit for military service 4F correlator, in Fourier optics The 4f electron shell Section 4(f) of the United States DOT act of 1966, which regulates acquiring park and historic properties for transportation use. 4F case, a 4 February 2006 controversial criminal case in Barcelona Flottille 4F a French naval aviation squadron LMS Fowler Class 4F, a class of 0-6-0 steam locomotive February 1992 Venezuelan coup d'état attempt, known in Venezuela as "4F".
4F or 4-F may refer to:
- 4F (company), a Polish sportswear company
- 4-F classification in the U.S. Selective Service System, identifying a person as unfit for military service
- 4F correlator, in Fourier optics
- The 4f electron shell
- Section 4(f) of the United States DOT act of 1966, which regulates acquiring park and historic properties for transportation use.
- 4F case, a 4 February 2006 controversial criminal case in Barcelona
- Flottille 4F a French naval aviation squadron
- LMS Fowler Class 4F, a class of 0-6-0 steam locomotive
- February 1992 Venezuelan coup d'état attempt, known in Venezuela as "4F".