File:X MPAA.png - Wikipedia

MPAA X Rating, Scary Logos Wiki

File:X rating symbol.png - Wikimedia Commons

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

What happened to the X Rating?

Fritz the Cat (1972) JPK's Adventures in Cinema

This Film Is Not Yet Rated (Movie 2006): MPAA Gets an 'F

RetroNewsNow on X: 🎬In November 1968, the Motion Picture Association of America's film rating system was officially introduced with the ratings G, M, R and X / X

Storm Hy-Road X Bowling Ball Review

X adds Formerly Twitter to App Store listing as app plunges in the charts

TV Ratings: The Voice Tops X Factor