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Desilu Productions, co-founded by Arnaz, was a prominent television production company active from 1950 to 1962. It gained immense popularity for producing the iconic sitcom "I Love Lucy," starring Lucille Ball and Arnaz himself. Desilu also produced other successful shows, including "The Untouchables" and "Star Trek." The company's name is a portmanteau of "Desi" (Arnaz's nickname) and "Lucy" (Ball's character name in "I Love Lucy").