Editing Unit

{{wiktionary|unit}}
'''Unit''' may refer to:
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== General measurement ==
* [[Unit of measurement]], a definite magnitude of a physical quantity, defined and adopted by convention or by law
**[[International System of Units]] (SI), modern form of the metric system
**[[English units]], historical units of measurement used in England up to 1824
**[[Unit of length]]

==Science and technology==

=== Physical sciences ===
* [[Natural unit]], a physical unit of measurement
* [[Geological unit]] or rock unit, a volume of identifiable rock or ice
* [[Astronomical unit]], a unit of length roughly between the Earth and the Sun

===Chemistry and medicine===
* [[Equivalent (chemistry)]], a unit of measurement used in chemistry and biology
* Unit, a vessel or section of a [[chemical plant#Chemical processes|chemical plant]]
* [[Blood unit]], a measurement in blood transfusion
* [[Enzyme unit]], a measurement of active enzyme in a sample
* [[International unit]], a unit of measurement for nutrients and drugs

===Mathematics===
* Unit number, the number [[1]]
* Unit, [[identity element]]
* [[Unit (ring theory)]], an element that is invertible with respect to ring multiplication
* Unit, a [[tuple]] of length 0; an empty tuple
* [[Statistical unit]], a data point on which statistical analysis is performed
* [[Unit angle]], a full turn equal to an angle of 1
* [[Unit circle]], a circle with a radius of length 1
* [[Unit cube]], a cube with sides of length 1
* [[Unit fraction]], a reciprocal of a positive integer
* [[Unit imaginary number]], square root of negative 1   <math>(\sqrt{-1})</math>
* [[Unit impulse]], an impulse of height 1
* [[Unit interval]], an interval of distance 1
* [[Unit matrix]], a diagonal matrix such that all elements on the main diagonal are 1 and all the others are zero
* [[Unit round-off]], an upper bound on the relative error due to rounding in floating point 
* [[Unit set]], a singleton, a set with exactly 1 element
* [[Unit sphere]], a sphere with a radius of length 1
* [[Unit square]], a square with sides of length 1
* [[Unit vector]], a vector with length equal to 1
* [[Unit type]], a type allowing only one value in type theory

===Computing===
* [[Central processing unit]], the electronic circuitry within a computer that carries out the instructions of a computer program
* [[GNU Units]], a software program for unit conversion
* [[Rack unit]], a unit of measure most commonly used to define the size of certain computing equipment
* [[Unit testing]], a method by which individual units of source code are tested

==Business==
* [[Stock keeping unit]], a discrete inventory management construct
* [[Strategic business unit]], a profit center which focuses on product offering and market segment
* [[Unit of account]], a monetary unit of measurement
* [[Unit coin]], a small coin or medallion (usually military), bearing an organization's insignia or emblem
* [[Work unit]], the name given to a place of employment in the People's Republic of China
* [[Telephone card]] unit. When bought contains a certain amount of units, which make up their own currency for making telephone calls, that may not necessarily correspond to the monetary cost of the actual telephone card.

==Military==
* [[Active service unit]], the former Provisional Irish Republican Army cell
* [[Military unit]], an homogeneous military organization whose administrative and command functions are self-contained
* [[Sayeret Matkal]] (The Unit), the Israeli special forces unit

==Arts and entertainment==
* [[UNIT]], a fictional military organization in the science fiction television series ''Doctor Who''
* [[Unit of action]], a discrete piece of action (or beat) in a theatrical presentation

===Music===
* [[Album-equivalent unit]], a unified measure of music sales across traditional and digital formats
* [[Unit (album)|''Unit'' (album)]], 1997 album by the Australian band Regurgitator
* [[The Units]], a synthpunk band

===Television===
* ''[[The Unit]]'', an American television series
* ''[[The Unit: Idol Rebooting Project]]'', South Korean reality TV survival show

==Other uses==
* [[Unit of alcohol]], a measure of the volume of pure ethanol in an alcoholic beverage
* [[Unit (housing)]], a self-contained suite of rooms within a set of similar dwellings
* Unit, [[course credit]] at a school or other educational institution
* [[Multiple unit]], self-propelled train carriage capable of coupling other units of the same type
* [[Head unit]], a component of a stereo system mounted inside of a vehicle
* [[Unit (Cristian Fleming)]] (born 1974), electronic musician based in New York City
* [[Unit (Norway)]], a government directorate

==See also==
* [[Air unit (disambiguation)]]
* [[Piece (disambiguation)]]
* [[Subunit (disambiguation)]]
* [[UNITA]], the second-largest political party in Angola
* [[Unite (disambiguation)]]
* [[Unity (disambiguation)]]
* [[United (disambiguation)]]
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* {{intitle}}

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