What is Nj?

Nano- is a prefix (symbol n) in the SI system of units denoting a factor of 10⁻⁹. It is often used in prefixing time and length units encountered in electronics and computer systems, like 30 nanoseconds (symbol ns) and 100 nanometres (nm).
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The joule (IPA: [dʒuːl] or [dʒaʊl]) (symbol: J) is the SI unit of energy.
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International System of Units (abbreviated SI from the French Le Système international d'unités) is the modern form of the metric system.
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Because energy is defined via work, the SI unit for energy is the same as the unit of work – the joule (J), named in honour of James Prescott Joule and his experiments on the mechanical equivalent of heat.
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NJ (nj in lower case) is a letter present in many South Slavic languages such as Croatian, Serbian and Macedonian (the latter two in their Latin-alphabet forms). It is also in Albanian.
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State of New Jersey

Flag of New Jersey Seal
Nickname(s): Garden State^[1]
Motto(s): Liberty and prosperity

Official language(s) English de facto

Capital Trenton

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The following is a list of abbreviations used by the United States Postal Service. They are used to help the postal service process mail with optical character recognition and other automated equipment.
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reporting mark is an identification assigned by the Association of American Railroads (AAR) to rail carriers and other companies operating in North America.

Reporting mark standard practices

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Nordjyske Jernbaner A/S (abbreviated NJ) is a Danish railway company operating in Vendsyssel. The company was formed in 2001 as a merger of Hjørring Privatbaner A/S (HP) and Skagensbanen A/S (SB).
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