F (disambiguation)

F is the sixth letter of the Latin alphabet.

F may also refer to:

Mathematics

 * F or f, the number 15 in hexadecimal and higher positional systems
 * pFq, the hypergeometric function
 * F-distribution, a continuous probability distribution
 * F-test, a statistical test
 * f, SI prefix femto, factor 10&minus;15
 * $F$, Fibonacci number

Computing and engineering

 * 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-measure, the harmonic mean of precision and recall
 * f, in programming languages often used to represent the floating point
 * F connector, used for inlet in cable modems
 * F crimp, a type of solderless electrical connection
 * F band (NATO), a radio frequency band from 3 to 4 GHz
 * F band (waveguide), a millimetre wave band from 90 to 140 GHz

Physics

 * °F, degree on the Fahrenheit temperature scale
 * F, for farad, a unit for electric capacitance
 * $F$ or ℱ, the Faraday constant
 * $f$, focal length of a lens
 * f-number (sometimes called f-ratio, f-stop, or written f/), the focal length divided by the aperture diameter
 * $$\vec F$$, $F$, $F$, force
 * $f$, frequency
 * F (or A), Helmholtz Free Energy
 * F, the electromagnetic field tensor in electromagnetism
 * Often generalized to include the field tensors of other interactions, as in i.e. the gluon field strength tensor.
 * F region, part of the ionosphere

Chemistry

 * Fluorine, symbol F, a chemical element
 * f-block, a block of elements in the periodic table of elements
 * F (or Phe), abbreviation for compound phenylalanine

Biology

 * Form (botany)
 * Form (zoology)
 * Bioavailability, which is expressed as the letter "F" in medical chemistry equations
 * Haplogroup F (Y-DNA), a patrilineal haplogroup
 * Haplogroup F (mtDNA), a matrilineal haplogroup

Music

 * F (musical note)
 * F major, a scale
 * F minor, a scale
 * F major chord, Chord names and symbols (popular music)
 * f, Forte (music)
 * F (album), an album by Japanese singer Masaharu Fukuyama
 * F Album, an album by Japanese duo KinKi Kids
 * "F", song on the double A-side single "Tsume Tsume Tsume/F" by Japanese metal band Maximum the Hormone

Transport

 * 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
 * Tokyo Metro Fukutoshin Line, a subway service operated by the Tokyo Metro, labeled Logo of Tokyo Metro Fukutoshin Line.svg
 * The NYSE ticker symbol of the Ford Motor Company
 * JRW kinki-F.svg, the official West Japan Railway Company service symbol for the Osaka Higashi Line.
 * Ford F-Series, a series of full-size pickup trucks from Ford Motor Company

Military

 * F, a class of designation in the United States military aircraft designation systems which stands for "Fighter"
 * F, a common designation for fighter aircraft
 * Foxtrot, the military time zone code for UTC+06:00
 * F band (NATO), a radio frequency band from 3 to 4 GHz

Other uses

 * F (film), a 2010 film directed by Johannes Roberts
 * 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
 * f, common abbreviation in lexicons meaning feminine grammatical gender
 * Fax, referring to a facsimile machine
 * F, abbreviation for fax number
 * The citation abbreviation of the Federal Reporter
 * F, Fujitsu's mobile phones in Japan
 * Forward position in Australian Rules football
 * "F" or "F***", sometimes used to censor "fuck".
 * f, abbreviation for the social networking service Facebook
 * Common abbreviation for floor (for example, "3F" = 3rd floor)
 * 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)
 * F, the production code for the 1964 Doctor Who serial The Aztecs
 * "F" Is for Fugitive, the sixth novel in Sue Grafton's "Alphabet mystery" series, published in 1989