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An EMD SD40 A unit owned by BNSF Railway
An A unit, in railroad terminology, is a diesel locomotive (or more rarely an electric locomotive) equipped with a driving cab and a control system to control other locomotives in a multiple unit, and therefore able to be the lead unit in a consist of several locomotives controlled from a single position.[1] This terminology is generally used in North America, since only there was it commonplace to build B units—cabless locomotive units which normally could not lead a train.
^Solomon, Brian (2000). The American Diesel Locomotives. Osceola, WI: MBI Publishing Company. pp. 56–57. ISBN 0-7603-0666-4.
An Aunit, in railroad terminology, is a diesel locomotive (or more rarely an electric locomotive) equipped with a driving cab and a control system to...
UNIT is a fictional military organisation from the British science fiction television series Doctor Who and its spin-off series Torchwood and The Sarah...
episodes. The series focuses on a top-secret military unit modeled after the real-life U.S. Army special operations unit commonly known as Delta Force....
controversial units Natural unit, a physical unit of measurement Geological unit or rock unit, a volume of identifiable rock or ice Astronomical unit, aunit of...
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The SI comprises a coherent system of units of measurement starting with seven base units, which are the second (symbol s, the unit of time), metre (m...
Unit 217, frequently called Duvdevan (Hebrew: דובדבן, lit. 'cherry'), is a mistaʽaravim unit in the Commando Brigade of the Israel Defense Forces. It is...
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Aunit of measurement, or unit of measure, is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard...
A housing unit, or dwelling unit, (at later mention often abbreviated to unit) is a structure or the part of a structure or the space that is used as a...
In chemistry, a formula unit is the smallest unit of a non-molecular substance, such as an ionic compound, covalent network solid, or metal. It can also...
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units are units of measurement derived from the seven SI base units specified by the International System of Units (SI). They can be expressed as a product...
In pharmacology, the international unit (IU) is aunit of measurement for the effect or biological activity of a substance, for the purpose of easier...
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