FL or variations may refer to:

Businesses and organizations

AirTran Airways AirTran Airways was a low-cost U.S. airline that was originally headquartered in Orlando, Florida, and ceased operation following its acquisition by Southwest Airlines. AirTran Airways was established in 1993 as Conquest Sun Airlines by the ...

(IATA airline code), defunct American airline * FL Group, an Icelandic investment company with an emphasis on flight and tourism industry * Foot Locker (ticker symbol), retailer

Numismatics

* Florin (disambiguation), various coins * Guilder, various coins also sometimes called "florin"

Places

* Florida (United States postal abbreviation) * Liechtenstein (''Fürstentum Liechtenstein'')

Science and technology

Biology and medicine

FLT3LG Fms-related tyrosine kinase 3 ligand (FLT3LG) is a protein which in humans is encoded by the ''FLT3LG'' gene. Flt3 ligand (FL) is a hematopoietic four helical bundle cytokine. It is structurally homologous to stem cell factor (SCF) and colony s ...

(Fms-related tyrosine kinase 3 ligand), a protein *

Fluffy transcription factor The fluffy (fl) gene of ''Neurospora crassa'' is required for asexual sporulation and encodes an 88 kDa polypeptide containing a typical fungal A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that incl ...

, gene of ''Neurospora crassa'' * Fluorouracil (5-FU), and leucovorin (folinic acid), a chemotherapy regimen for treating colon cancer *

Follicular lymphoma Follicular lymphoma (FL) is a cancer that involves certain types of white blood cells known as lymphocytes. The cancer originates from the uncontrolled division of specific types of B-cells known as centrocytes and centroblasts. These cells normal ...

in medicine * Frontal lobe, the largest brain lobe

Mathematics and computing

FL (complexity) In computational complexity theory, the complexity class FL is the set of function problems which can be solved by a deterministic Turing machine in a logarithmic amount of memory space.. As in the definition of L, the machine reads its input from ...

, a class of functions in complexity theory * FL (programming language), a functional programming language *

Adobe Flash Professional Adobe Animate (formerly Adobe Flash Professional, Macromedia Flash, and FutureSplash Animator) is a multimedia authoring and computer animation program developed by Adobe Inc. Animate is used to design vector graphics and animation for televi ...

, software which uses "Fl" as its icon abbreviation *

FL Studio FL Studio (previously known as FruityLoops before 2003) is a digital audio workstation (DAW) developed by the Belgian company Image-Line. FL Studio features a graphical user interface with a pattern-based music sequencer. The program is avail ...

, a music production software program

Other uses in science and technology

* Femtolitre, a metric unit of volume * Flerovium, symbol Fl, a chemical element * Flight level, a standard nominal altitude of an aircraft, in hundreds of feet * "Fluid", as in fluid ounce (fl oz) * Foot-lambert, a unit of luminance * Friedmann–Lemaître metric in cosmology

Sport

* Federal League, a United States baseball league in 1914 * English Football League, the governing body of two of the leagues in the English football pyramid

Genealogy

* '' Floruit'', Latin for he/she flourished, referring to a time period in which someone was known to be alive or active

Other uses

* (fl), a typographical ligature * Flavius, a ''gens'' (family name) or ''praenomen'' (personal name) in ancient Rome * Flawless, a grade of diamond clarity * Fork length, a standard

fish measurement Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish ...

* Free List (Liechtenstein), a center-left political party in Liechtenstein *

Volvo FL The Volvo FL is Volvo's smallest truck and is suitable for local and regional distribution operations, refuse collection, construction truck or small format tractor. The Volvo FL has been built since the summer of 1985 in a variety of different mo ...

, a medium weight truck developed by Volvo