The Ghostbusters franchise consists of American supernatural horror-comedies, based on an original concept created by Dan Aykroyd and Harold Ramis in 1984’s film Ghostbusters. The franchise expanded with licensed action figures, books, comic books, video games, television series, theme park attractions, and other original Ghostbusters-themed products. The Ghostbusters use a specialized set of equipment in the 1984 film, and all subsequent Ghostbusters fiction includes similar equipment to aid in the capture and containment of ghosts. Their equipment includes proton packs, used to control and lasso ghosts; ghost traps, used to capture ghosts; and PKE meters, handheld devices used to detect psychokinetic energy.