Star Trek: The Original Series is a revised title for the series Star Trek, which originally aired as a TV series on NBC from 1966 to 1969. The series began the Star Trek franchise and has gone on to have stories in multiple formats; movies, novels, comics, short stories, video games and more. The sub-title The Original Series is used to distinguish it from its sequel series, and from the larger Star Trek franchise. The sub-title is used on some products, such as DVDs, however novels and comics continue to title TOS publications simply as Star Trek.