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 <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), 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 (currency), a proposal for a new international currency developed by the BRICS+ Business Council
  • 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)
  • Changan UNI-T, a compact crossover SUV
  • Uni.T, a South Korean girl group
  • UNITA, the second-largest political party in Angola
  • Unite (disambiguation)
  • Unity (disambiguation)
  • United (disambiguation)