PG-13, PG, G, and R, no matter if you are a movie lover or only watch movie occasionally, you should see those a lot of times. But do you really understand their true meanings? I think most people normally ignore them just like me. Actually I did have a discussion on whether kids under 13 can watch PG-13 movies. As always, internet helps me again.
In the United States, there are many different movie rating systems, but the MPAA (motion picture rating systems) rating system is the most recognized system for classifying potentially offensive content.
The original MPAA movie ratings system started in 1968 and only in use for two years. It consisted of:
\* Rated G: General Audiences. All ages admitted.
\* Rated M: Suggested for Mature Audiences. Parental discretion advised.
\* Rated R: Restricted. Persons under 16 are not admitted unless accompanied by parent or adult guardian.
\* Rated X: Persons under 17 not admitted.
The famous PG-13 was added at July 1984 for those movies that have some materials may be inappropriate for children under 13. Besides PG-13, the system currently in use has 4 other ratings.
G - General Audiences
All ages admitted
PG - Parental guidance suggested
Some material may not be suitable for children.
R - Restricted
Under 17 requires accompanying parent or adult guardian.
No one 17 and under admitted.
For more details, please check out this link http://en.wikipedia.org/wiki/PG-13