From Compsci.ca Wiki
PG-13, is CompSci's rating. All content should dwell within this domain. PG-13 is defined loosely, basically by these points by the film industry:
- Can contain drug references.
- Can contain single uses of sexually derived words, as long as not in sexual context.
- Anything in between PG and R.
- Material should be safe for people as young as 13.
- In some films f*ck has been allowed.