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# Unit

C O N T E N T S
Rank: 100%

Unit may refer to:

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
• , historical units of measurement used in England up to 1824
• Unit of length
• Humorous units of measurement Some less serious or controversial units

Science and technology

Physical sciences
• , a physical unit of measurement
• 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
• , a measurement in blood transfusion
• , 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,
• Unit (ring theory), an element that is invertible with respect to ring multiplication
• Unit, a of length 0; an empty tuple
• , a data point on which statistical analysis is performed
• , a full turn equal to an angle of 1
• , a circle with a radius of length 1
• , a cube with sides of length 1
• , a reciprocal of a positive integer
• Unit imaginary number, square root of negative 1 $\left(\sqrt\left\{-1\right\}\right)$
• , an impulse of height 1
• , an interval of distance 1
• , a diagonal matrix such that all elements on the main diagonal are 1 and all the others are zero
• , an upper bound on the relative error due to rounding in floating point
• , a singleton, a set with exactly 1 element
• , a sphere with a radius of length 1
• , a square with sides of length 1
• , a vector with length equal to 1
• , 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
• , a software program for unit conversion
• , a unit of measure most commonly used to define the size of certain computing equipment
• , a method by which individual units of source code are tested

• 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
• , a small coin or medallion (usually military), bearing an organization's insignia or emblem
• , the name given to a place of employment in the People's Republic of China

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

Arts and entertainment
• , 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
• Unit (album), 1997 album by the Australian band Regurgitator
• , a synthpunk band

Television
• , an American television series
• , 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, at a school or other educational institution
• , self-propelled train carriage capable of coupling other units of the same type
• , 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

• Air unit (disambiguation)
• Piece (disambiguation)
• Subunit (disambiguation)
• , the second-largest political party in Angola
• Unite (disambiguation)
• Unity (disambiguation)
• United (disambiguation)

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