Acronyms - Trade

New here, what are common acronyms and what do they mean? I didn't see these on the acronym lists.

I figured out that LF means looking for. What about:

N -
IF -

Please add any others that are commonly used for trading on this site.

i believe N = need.

N means "need" and lF sounds like a typo of "LF"
You'll also see "O x N y" as in "offering x, need y"
The other acronyms you'll come across would most likely be the ones used to describe items such as "ed" for enhanced damage or defense, "ll" for life leech, "ar" for all res or attack rating, etc..