USCCB classifications:
(United States Conference of Catholic Bishops)

• A-I — general patronage
• A-II — adults and adolescents
• A-III — adults
• A-IV — adults, with reservations (this indicates films that, while not morally offensive in themselves, are not for casual viewing because they require some analysis and explanation in order to avoid false impressions and interpretations)
• L — limited adult audiences, films whose problematic content many adults would find troubling (replaced A-IV classification Nov. 1, 2003)
• O — morally offensive

MPAA ratings: (Motion Picture Association of America)

• G — general audiences, all ages admitted
• PG — parental guidance suggested, some material may not be suitable for children
• PG-13 — parents are strongly cautioned. Some material may be inappropriate for children under 13
• R — restricted, under 17 requires accompanying parent or adult guardian
• NC-17 — no one 17 and under admitted (age limit may vary in certain areas)