R (MPA), Rating System Wiki

An R rated film is unsuitable for minors. In this case, content is not suitable for under 17 years of age. It is against the theater policy to admit unaccompanied minors to R-rated films. Those under 17 must be accompanied by a parent or guardian (at least 21 years old). It may include strong brutal and graphic violence (including blood), excessive strong language, nudity, and drug use. Although MPA ratings are theoretically advisory as it has no power to enforce ratings, the R rating is legally

MPAA Rating Screen (GP)/American International Pictures (1971)

R (MPA), Rating System Wiki

Geologic time scale - Wikipedia

MPAA Rating IDs, Logo Timeline Wiki

MPAA 1976 Special R Rating Logo Banner : Motion Picture Association of America (MPAA) : Free Download, Borrow, and Streaming : Internet Archive

Rating System Wiki

Solar System - Wikipedia

MPA Film Rating System, Logopedia

List of NC-17 rated films - Wikipedia

Motion Picture Association film rating system - Wikipedia