Hyperspace

• Hyperspace (science fiction), a concept often used in science fiction writing
• Hyperspace (book), a book by Dr. Michio Kaku that attempts to explain the possibility of ten-dimensional space using string theory
• Minkowski spacetime, a concept, often referred to by science fiction writers as "hyperspace", that refers to the four-dimensional space-time of special relativity
• Hyperspace Technologies, a custom web design and development company out of Athens, Georgia
• Space (documentary), a 2001 BBC documentary that was distributed in the U.S. as Hyperspace
• HyperSpace (software), an "instant-on" operating system by Phoenix Technologies
• A book in the Choose Your Own Adventure series

Hyperspace also sounds similar to several terms used in mathematics, the term hyper often being used to refer to higher dimensional constructs:

• Hyperspace, a Euclidean space of dimension greater than three. (The term was common in late nineteenth century British books, sometimes in the context of paranormal fantasies, but has become rarer since then.)
• In topology a hyperspace is a topological space whose elements are subsets of another topological space.
• Hyperplane, an affine subspace of codimension one in such a space.
• Hypersphere, a round sphere dimension higher than 3, especially if embedded in such a space.
• Hypersurface, a submanifold of codimension one, especially if embedded in such a space. This term includes hypersphere and hyperplane as special cases.
• Tesseract, also known as a hypercube, a cube [0,1]^d, where d > 3. The word tesseract was used, especially in nineteenth and early twentieth century British semi-popular books on mathematics, to denote the special case d = 4.

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