Yup.

I think there is a subtle distinction between acronyms and abbreviations, though...

An abbreviation SHOULD have full stops (periods) after each letter, but not in an acronym...

N.S.P.C.C., R.S.P.C.A., P.C., U.S.A. - all are abbreviations - or that's what I was told in the dark ages when I was at primary school!

Acronyms are abbreviations which are supposed to approximately spell a word, which is different - hence the full stops are dropped.

At least, I think so...!