Masters of the Universe (commonly abbreviated to MOTU; and sometimes informally referred to as He-Man, after the lead hero) is a media franchise created by Mattel.
Although featuring a vast line-up of characters, the main premise revolves around the heroic characters of He-Man and evil Skeletor on planet Eternia. Since its initial launch late 1981, the franchise has spawned a variety of products, including six lines of action figures, four animated television series, countless comic series and a film.