DF or df may refer to:
Gaming
* ''
DeFRaG
In the maintenance of file systems, defragmentation is a process that reduces the degree of fragmentation. It does this by physically organizing the contents of the mass storage device used to store files into the smallest number of contiguous ...
'', a modification for the computer game ''Quake III Arena''
* ''
DragonFable
''DragonFable'' is a free-to-play, online, browser-based, single-player, fantasy, role-playing game developed by Artix Entertainment and updated on a weekly basis. Players may access locked game content by upgrading to a premium account for a on ...
'', a 2006 video game by Artix Entertainment
* ''
Dwarf Fortress
''Dwarf Fortress'' (previously titled ''Slaves to Armok: God of Blood Chapter II: Dwarf Fortress'') is a construction and management simulation and roguelike indie video game created by Bay 12 Games. Available as freeware and in development si ...
'', a 2006 sandbox-style computer game
Places
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Distrito Federal (Brazil)
The Federal District ( ) is one of 27 States of Brazil, federative units of Brazil. Located in the Central-West Region, Brazil, Center-West Region, it is the List of Brazilian states by area, smallest Brazilian federal unit and the only one that ...
, or the Federal District
*
Distrito Federal (Mexico)
Mexico City is the capital and largest city of Mexico, as well as the most populous city in North America. It is one of the most important cultural and financial centers in the world, and is classified as an Alpha world city according to the ...
, or the Federal District, now known as Mexico City
Politics
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Danish People's Party
The Danish People's Party (DPP; , DF) is a nationalist and right-wing populist political party in Denmark. It was formed in 1995 by former members of the Progress Party (FrP).
The party saw a period of significant growth after its founding a ...
(''Dansk Folkeparti'')
*
Democratic Front (Bosnia and Herzegovina)
The Democratic Front ( Bosnian: Demokratska fronta, DF / Демократски фронт, ДФ) is a multi-ethnic social-liberal political party in Bosnia and Herzegovina. Its founder and current leader is Željko Komšić, the incumbent Croat ...
(Demokratska fronta)
*
Democratic Front (Montenegro)
The Democratic Front (, DF) was a right-wing populism, right-wing populist and Social conservativism, socially conservative political alliance in Montenegro. It was composed of the New Serb Democracy, Movement for Changes and Democratic People's ...
(''Demokratski front'')
Science and technology
*
df (Unix)
df, short for ''disk free'', is a shell command for reporting the amount of available storage space on file systems on which the user has read access. is typically implemented using the or system calls.
The Single Unix Specification (SUS) sp ...
, a Unix command to report disk space usage by a filesystem
*
Dairy
A dairy is a place where milk is stored and where butter, cheese, and other dairy products are made, or a place where those products are sold. It may be a room, a building, or a larger establishment. In the United States, the word may also des ...
free, identifying products that contain no milk
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Decapacitation factor, in biochemistry
*
Degrees of freedom
In many scientific fields, the degrees of freedom of a system is the number of parameters of the system that may vary independently. For example, a point in the plane has two degrees of freedom for translation: its two coordinates; a non-infinite ...
, various measures in statistics, mathematics and physics
*
Density function
In probability theory, a probability density function (PDF), density function, or density of an absolutely continuous random variable, is a Function (mathematics), function whose value at any given sample (or point) in the sample space (the s ...
, a mathematical function with a wide range of applications
*
Dielectric loss
In electrical engineering, dielectric loss quantifies a dielectric material's inherent dissipation of electromagnetic energy (e.g. heat). It can be parameterized in terms of either the loss angle or the corresponding loss tangent . Both refer ...
*
Direction finding
Direction finding (DF), radio direction finding (RDF), or radiogoniometry is the use of radio waves to determine the direction to a radio source. The source may be a cooperating radio transmitter or may be an inadvertent source, a naturall ...
, a technique used to locate radio transmitters
*
Direction flag
The direction flag is a flag that controls the ''left-to-right'' or ''right-to-left'' direction of string processing, stored in the FLAGS register on all x86-compatible CPUs.Dissipation factor
In physics, the dissipation factor (DF) is a measure of loss-rate of energy of a mode of oscillation (mechanical, electrical, or electromechanical) in a dissipative system. It is the reciprocal of quality factor, which represents the "quality" or ...
, a measure of loss-rate of energy of an oscillation mode in a dissipative system
*
Dongfeng (missile)
The ''Dongfeng'' () series, typically abbreviated as "DF missiles", are a family of short, medium, intermediate-range and intercontinental ballistic missiles operated by the Chinese People's Liberation Army Rocket Force (formerly the Second ...
, a Chinese intercontinental ballistic missile
* Dongfeng series of diesel locomotives
**
China Railways DF
The DF () was a type of diesel-electric locomotive used in the People's Republic of China. It was first introduced in 1958 and was produced until 1974. It was the first common mixed-traffic diesel-electric locomotive in China and was used for bot ...
**
China Railways DF4
**
China Railways DF8
The DF8 () is a type of diesel-electric locomotive used by China Railway in the People's Republic of China. It was in production from 1984 until mid-1990s, with mass production starting in 1989. The revised DF8B is still in production today. DF8 ...
*
Methylphosphonyl difluoride
Methylphosphonyl difluoride (DF), also known as EA-1251 or difluoro, is a chemical weapon precursor. Its chemical formula is CH3POF2. It is a Schedule 1 substance under the Chemical Weapons Convention. It is used for production of sarin and so ...
, a chemical weapons precursor
*
Daylight factor
In architecture, a daylight factor (DF) is the ratio of the light level inside a structure to the light level outside the structure. It is defined as:
:''DF = (Ei / Eo) x 100%''
where,
''Ei'' = illuminance due to daylight at a point on the indoor ...
(DF), the ratio of the light level inside a structure to the light level outside the structure.
Other uses
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Defender (association football)
In the sport of association football, a defender is an outfield player whose primary role is to stop attacks during the game and prevent the opposition from scoring.
Defenders fall into four main categories: centre-backs, full-backs, sweepers ...
*
Delta Force
The 1st Special Forces Operational Detachment–Delta (1st SFOD-D), also known as Delta Force, Combat Applications Group (CAG), or within Joint Special Operations Command (JSOC) as Task Force Green, is a Special operation forces, special operat ...
, a component of the U.S. Army Joint Special Operations Command
*
Design Factory, a department of Aalto University
*
Duty Free
A duty-free shop or store is a retail outlet whose goods are exempt from the payment of certain local or national taxes and duties, on the requirement that the goods will be sold to travelers who will take them out of the country, who will t ...
, goods which are free from tax or duty
*
New Zealand DF class locomotive (1979)
The New Zealand DF class Locomotives of New Zealand, locomotive of 1979 is a class of 30 Co-Co locomotives, Co-Co diesel locomotive, diesel-electric locomotives built by General Motors Diesel of Canada between 1979 and 1981. Between 1992 and 19 ...
*
Quantum Air
Quantum Air (formerly known as AeBal or Aerolíneas de Baleares) was an airline based in Madrid, Spain. It operated domestic scheduled services within Spain, as well as charter and ACMI operations all over Europe. Its fleet was originally wet- ...
(formerly AeBal), Spanish airline (IATA code DF)
See also
*
Dongfeng (disambiguation)
{{disambiguation, geo