Unit

Template:Sister project 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
  • 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
• 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 $(\sqrt{-1})$
• 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), 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
• Prison Unit, a group of cells forming a cellblock or complex within a prison, such as the John B. Connally Unit, or Unit 32.
• 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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