FSNASM

If you can't be bothered to type out the words, I can't be bothered to answer your question. I don't speak acronym.

Because I don't know what it stands for either. All I know is that it is some kind of program for ASM.

idkwtie

If you don't put in the effort to ask, we won't put forth the effort to help.

I think that may actually be the name of the program.

Google is your friend: http://www.google.com/search?q=fsnasm

What are you trying to do? There are likely other and better assemblers out there.