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

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, course credit at a school or other educational institution
Multiple unit, self-propelled train carriage capable of coupling other units of the same type