Warp drive is a hypothetical faster-than-light (FTL) propulsion system in many works, most notably Star Trek. A spacecraft equipped with a warp drive may travel at apparent speeds greater than that of light by many orders of magnitude. In contrast to many other FTL technologies, such as a jump drive or hyper drive, the warp drive does not permit instantaneous (or near instantaneous) travel between two points but involves a measurable passage of time. Spacecraft at warp velocity can continue to interact with objects in "normal space". Some of the other fiction in which warp drive technology is featured include: Stars!, EVE Online, Earth and Beyond, StarCraft, DarkSpace, Starship Troopers, Doctor Who, and Star Ocean.