F (disambiguation)

F is the sixth letter of the Latin alphabet.

F may also refer to:

Science

Fahrenheit
Farad, a unit for electric capacitance
Faraday constant
Fluorine (symbol), a chemical element
Focal length of a lens
- f-number (sometimes called f-ratio, f-stop, or written f/), the focal length divided by the aperture diameter
Force
Form (botany)
Frequency
Bioavailability, which is expressed as the letter "F" in medical chemistry equations
F band (NATO), a radio frequency band from 3 to 4 GHz
F band (waveguide), a millimetre wave band from 90 to 140 GHz
f-block, a group of elements on the periodic table elements
F region, part of the ionosphere
Haplogroup F (Y-DNA), a patrilineal haplogroup
Haplogroup F (mtDNA), a matrilineal haplogroup
Phenylalanine, abbreviated as Phe or F
Helmholtz Free Energy, also abbreviated as A
The electromagnetic field tensor in electromagnetism
- This is often generalize to include the field tensors of other interactions, as in i.e. the gluon field strength tensor.

The number 15 in hexadecimal and higher positional systems
The hypergeometric function _pF_q
F-distribution, a continuous probability distribution
- F-test, a statistical test
Femto, a prefix meaning 10⁻¹⁵
Fibonacci number

F (programming language), a subset of Fortran 95
F Sharp (programming language), a functional and object-oriented language for the .NET platform.
F* (programming language), a dependently typed functional language for the .NET platform.
F connector, used for inlet in cable modems
F crimp, a type of solderless electrical connection
F-measure, the harmonic mean of precision and recall
In programming languages, f is often used to represent floating points

"F", song on the double A-side single "Tsume Tsume Tsume/F" by Japanese metal band Maximum the Hormone

F Sixth Avenue Local, a rapid transit service of the New York City Subway
F (S-train), trains on the ring line of Copenhagen's commuter train network
F Market & Wharves, a heritage streetcar line operated by the San Francisco Municipal Railway

France, on the vehicle registration plates of the European Union
F (grade), a failing grade
f, the symbol used in the International Phonetic Alphabet for the voiceless labiodental fricative
Fax, referring to a facsimile machine
f, common abbreviation in lexicons meaning feminine grammatical gender
The citation abbreviation of the Federal Reporter
The NYSE ticker symbol of the Ford Motor Company
Ford F-Series, a series of full-size pickup trucks from Ford Motor Company
F, Fujitsu's mobile phones in Japan
Forward position in Australian Rules football
"F" or "F***", sometimes used to bowdlerise "fuck".
F, abbreviation for fax number
f, abbreviation for the social networking service Facebook
F, a class of designation in the United States military aircraft designation systems which stands for "Fighter"
Common abbreviation for floor (for example, "3F" = 3rd floor)
F, a common designation for fighter aircraft
F word (disambiguation), euphemism for several words beginning with "f"
Dominical letter F for a common year starting on Tuesday
F, as an online expression of respects to a recently deceased person (as a reference to the videogame Call of Duty: Advanced Warfare)