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in technology, a consolidated unified (normalized) assembly of a machine or complex of machines that possesses complete interchangeability and independently accomplishes isolated functions. A unit is characterized by electric motors, reducers, pumps and so forth. Sometimes the term “unit” refers to a combination of two or more machines.
In the theory of algebraic numbers and in the theory of algebraic functions, a divisor of unity is called a unit, that is, a is a unit if there exists an element b such that ab = 1.