Star Trek is an American science fiction entertainment franchise created by Gene Roddenberry and under the ownership of CBS and Paramount. Star Trek: The Original Series and its live action TV spin-off shows, Star Trek: The Next Generation, Star Trek: Deep Space Nine, Star Trek: Voyager, and Star Trek: Enterprise as well as the Star Trek film series make up the main canon, while the canonicity of Star Trek: The Animated Series is debated and the expansive library of Star Trek novels and comics whilst still part of the franchise, are generally considered non-canon. The first series, now referred to as "The Original Series", debuted in 1966 and ran for three seasons on NBC. It followed the interstellar adventures of James T. Kirk and the crew of the starship Enterprise, an exploration vessel of a 23rd-century interstellar "United Federation of Planets". In creating the first "Star Trek", Roddenberry was inspired by Westerns such as Wagon Train, along with the Horatio Hornblower novels and Gulliver's Travels. Star Trek has been a cult phenomenon for decades. Fans of the franchise are called Trekkies or Trekkers. At least two museum exhibits of props travel the world. The series has its own full-fledged constructed language, Klingon. Several parodies have been made of Star Trek. Its fans, despite the end of Star Trek episodes on TV, have produced several fan productions to fill that void. Star Trek is noted for its influence on the world outside of science fiction. It has been cited as an inspiration for several technological inventions such as the cell phone. Moreover, the show is noted for its progressive civil rights stances.