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THX 1138 IMO.
THX was named after Tomlinson Holman as "THX" where the letter X stands for crossover. THX was also named as an homage to Lucas's first film THX 1138.
George Lucas's first film was 1971's "THX 1138"
Bald The Making of 'THX 1138' - 1971 is rated/received certificates of:
UK:U