Nm=not much. Wbu=what about you.
nm= not much
NM can mean New Mexico or "nevermind."
nm
If you mean nanometer, that's abbreviated "nm" (lowercase), and the answer is a million.
New Mexico
500000000 to the world
nm means nothing much nvm means never mind.
nothing much, what about you.
nm is nano-meters. There will be a number preceding the nm. This number indicates how many nano-meters for a full wave length of the laser light.
I'm not really sure what you mean by "a symbol". The NM state bird is the Road Runner.
My guess is that the NM stands for National Match, a better quality barrel