And....the 1978 John Carpenter film of the same name. Featuring Jamie Lee Curtis in her film debut (and also introducing us to the iconic blank, CREEPY white mask), Halloween was one of the highest-grossing independent films in recent history. Like Night Of The Living Dead, Halloween is also included in the Library of Congress's National Film Registry. I liked the film because, due to little violence and gore, it relied heavily on atmosphere, implication, and a compelling score. Halloween's main theme is one of the most widely recognized pieces of music associated with a horror film.
There's a lot of information up at the Wikipedia page I linked to, and it's all very interesting. Definitely sheds some light on why the movie was included in the National Film Registry. You should go read it! And tonight, if you're at home, you should watch Halloween.
Image Source: found at Best-Horror-Movies.com