User blog comment:ZTM1234/Daily Blog 1 Comic Rating/@comment-3012197-20110115194713

This is Marvel's official comic rating system:

ALL AGES - appropriate for all ages.

A - Appropriate for age 9 and up.

T+ TEENS AND UP - Appropriate for most readers 13 and up, parents are advised that they might want to read before or with younger children.

PARENTAL ADVISORY - 15 years and older. Similar to T+ but featuring more mature themes and/or more graphic imagery.

MAX: EXPLICIT CONTENT - 18 years old. Most Mature Readers books will fall under the MAX comics banner (created specifically for mature content titles), MAX and Mature-themed titles will continue to be designed to appear distinct from mainline Marvel titles, with the "MAX: Explicit Content" label very prominent on the cover. MAX titles will not be sold on the newsstand, and they will not be marketed to younger readers.