If

If or IF may also refer to:

Music

"If", a 2013 song by Glasvegas
"If (They Made Me a King)", a 1951 hit song by Perry Como
If (band), 1970s British progressive jazz-rock band
If (Glass Hammer album)
If (If album)
if (Mindless Self Indulgence album), a 2008 album recorded by Mindless Self Indulgence
"If", a song by Bananarama, released in 2001
"If..." (The Bluetones song), released in 1998
"If" (Bread song), originally released in 1971 and a number one UK single by Telly Savalas in 1975
"If", a song by The Cult from the album Ceremony
"If...", released in 1997 by The Divine Comedy from the album A Short Album About Love
"If" (Freemasons song), released in 2009
"If" (French Kiss song), released in 2011
"If" (Janet Jackson song), released in 1993
"If" (Kana Nishino song), released in 2010
"If" (Pink Floyd song), released in 1970
"If" (Red Hot Chili Peppers song), released in 2006
"If", a Joni Mitchell song on her 2007 album Shine
"If...", a 2011 orchestral concept album by Bill Ryder-Jones

If—, the Rudyard Kipling poem (published 1910)
if...., a 1968 Lindsay Anderson film starring Malcolm McDowell
If... (comic), a political comic strip which appears in the UK newspaper The Guardian
If (magazine), subtitled "Worlds of Science Fiction"
If... (TV series), a series of BBC drama-documentaries
Shin Megami Tensei if..., a 1994 video game in the Shin Megami Tensei series for the Super Famicom
If... (Desperate Housewives), a 2010 episode from the 6th season of Desperate Housewives
IF, a fictional character in the Hyperdimension Neptunia series

If, a small island in the Bay of Marseille, France, location of the Château d'If

The I_f current, a component current in the cardiac pacemaker potential
IF (x86 flag), the Interrupt Flag in the x86 architecture
Immunofluorescence, a form of labeling substances with fluorescent antibodies
Impact factor, a measure reflecting the average number of citations to articles published in scholarly journals
In Flames, a melodic death metal band from Sweden as well as a song from their album Lunar Strain
Information filter
Initiation factor, an important component in protein synthesis
Intelligent falling, an alternative theory of gravitation
Interactive fiction, text-based computer games featuring interactive stories and environments
Interface (computing), in Linux commands like ifup, ifdown and POSIX standards headers like if.h
Intermediate filament, a component of the cytoskeleton
Intermediate form, a data structure constructed from the input to a computer program from which the output is constructed
Intermediate frequency, an intermediate step in radio transmission or reception
Intermittent fasting, a diet having recurring periods of fasting
International Federation, as in a World Sports Governing Body.
Internal focusing, a lens technology in which focusing occurs only with internal elements
Internally Flawless, a grade of diamond clarity
Interstitial fluid, the liquid outside of a cell
Intrinsic factor, produced by the stomach
Iodine monofluoride, unstable interhalogen inorganic compound
Islamic Front (Syria), Sunni Islamist rebel group involved in the Syrian Civil War