Tesla Model X is named 'standout performer' in new safety crash tests

A History of the X and NC-17 Ratings – The Hollywood Reporter

Which is worse, rated R or MA? - Quora

1970's X Rating Screen by GrayLord791 on DeviantArt

Rating X: Twitter's chaotic year under Elon Musk's shock treatment

Saw X is rated R18 WITH CUTS by the MTRCB in the Philippines : r/saw

getTV - The movie ratings system began 52 years ago today — Nov 1, 1968. The first ratings were: G — General Audiences M — Mature (became PG) R — Restricted X —

The X-Files' Ratings Top 20 Million in 3-Day Viewing

X Factor 2014 ratings: Return of Cheryl Cole and Simon Cowell attracts biggest debut since 2011, The Independent

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X Parents Guide