NO - Either No or a a state zip code *shrugs* I just know it as November Oscar

NP

i've seen NO as an abbreviation for the city New Orleans, in Louisiana.

NQ

NR

NS

NT

NU

new?

NV

NW

northwest?

*pokes thread to see if there's still life in here*

NX

NY

(New York!)

NZ

New Zealand!)

OA
Order of the Arrow

OB

OC
Original Character

OD

overdose? XD