I haz been internetting with fic for years longer than I can remember but have been puzzled forever every time I see FRAO and unable to find a way to Google it to exactly find out where it has come from. Bloody accountant/lawyers have caused this stoopid thing to arise. In the UK we rate films etc by age guidelines roughly, which if you see 12, 15 or 18 is easy to get as an idea.
At last the whole truth about the FRMO
http://tfrrs.tripod.com/tfrrs.gifat source. My Archivist-Bits are tingling as we speak...