Parallel universe

Parallel universe, alternate reality, etc. may refer to:
*Parallel universe (fiction), alternate universes, worlds, realities and dimensions in fiction
*Multiverse (science), the hypothetical set of multiple possible universes
** Also see: Multiverse disambiguation page
*Many-worlds interpretation, of quantum physics

Parallel universe may also refer to:
*Parallel Universe (album), by "4 Hero"
*"Parallel Universe" (Red Hot Chili Peppers song)

Alternate reality may also refer to:
*Alternate Realities (Cherryh), an anthology of science fiction by C. J. Cherryh.
*Alternate Reality (computer game)
*Alternate reality game, a type of cross-media game.