G - Suitable for all readers. No sex, violence or offensive material. PG - May not be suitable for younger readers. Generally very tame in terms of violence and language. PG-13 - Generally recommended for teenagers or older. May contain moderate violence and some stronger language, but not too graphic. Sexual themes may be implied, but are not explicit. R - Suitable for mature readers. Contains some adult content. The fiction may contain strong language, heavy violence, or some heavier sexual content. NC-17 - Absolutely for adults only. Adult fiction is grouped under the "Adult" section. Likely contains extreme violence, strong language and/or explicit sexual content.Thanks hib. This used to be in general use, but now there are new odd ones. FF.POV uses a completely forgettable and incomprehensible new system which I shall rant about in the discussion thread. ... sasmom - Better People Than Pills - PG - Gen - House'd thoughts during Merry Christmas - sad: http://community.livejournal.com/house_reviews/31845.html