The concept of installation is closely associated with video and in general with the electric and electronic media which have favoured the multiplication of art’s materials: from light to movement, from the visual to the sonic, from polysensory to intellectually luxuriant experience. This association is seen in expressions such as video-installation or video-sculpture, multimedia installation –a term which, although sufficiently defined and theorized, has become confused as a result of the ravenous folly of computer science– sound installation (which usually also involves the visual) and others which imply media such as film, photography (whether projected, backlit, or printed), holography, light and laser, computer props and tools, and other aspects of the great technological and media bazaar of our times.