Unit

Unit may refer to:

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

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

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
Equivalent (chemistry), a unit of measurement used in chemistry and biology
Geological unit or rock unit, a volume of identifiable rock or ice
International unit, a unit of measurement for nutrients and drugs
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
- Humorous units of measurement Some less serious or controversial units
- Unit of length
  - Astronomical unit, a unit of length roughly between the Earth and the Sun
- Natural unit, a physical unit of measurement
Unit type, a type allowing only one value in type theory
Unit of alcohol, a measure of the volume of pure ethanol in an alcoholic beverage

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 (ring theory), an element that is invertible with respect to ring multiplication
Unit, identity element
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 number, the number 1
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

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

Unit (Cristian Fleming) (born 1974), electronic musician based in New York City
Unit (housing), a self-contained suite of rooms within a set of similar dwellings
Unit (Norway), a government directorate
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