The term THE BIG BANG THEORY TYPE can be summarized as a four letter word, 'NERD'. The Big Bang Theory is an American sitcom that aired from 2007 to 2019. It follows the lives of four nerdy friends who live in Pasadena, California. The show is known for its humor and its portrayal of geek culture. The characters are often seen wearing comic book t-shirts, playing video games, and discussing scientific theories. The show has become a cultural phenomenon, and the term 'NERD' has become synonymous with the show.