What does NP mean in Railroads?
This page is about the meanings of the acronym/abbreviation/shorthand NP in the Regional field in general and in the Railroads terminology in particular.
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What does NP mean?
- neptunium, Np, atomic number 93(noun)
- a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium