X rating - Wikipedia

A Brief History of the X Rating

MPAA Rating Bumper Rated X Remake (1968-1970) by TheAnthonyCorp on DeviantArt

Hollywood's Battle Against the X Rating, 30 Years Later - The Ringer

What happened to the X Rating?

Which is worse, rated R or MA? - Quora

Saw X' Is The Most Well-Reviewed Saw Movie Ever, By A Huge Margin

X-BIONIC Wollerau

TIL the 1983 film Scarface was originally given an X rating three times in a row by the MPAA. On the fourth appeal, the film was finally given an R rating, but

The X-Rated Cut Of 'RoboCop' Is Available To Stream On Prime Right Now

What is the difference between the movie ratings R (17+), X (19+) and XXX (21+) other than age, and what do they mean? - Quora