Virtual Reality is a three-dimensional environment within which the computer user can interact as if the space actually existed. Realistic sensory feedback is achieved by combining tactile interaction with video and audio. It is one of the most exciting developments of the computer field, and has applications that include everything from games and vocational training to military simulators.
Programs which use virtual reality technology are called simulators. Simulators may mimic the operation of an airplane or a surgical operation on a human body. Such simulators allow training in non-critical environments, where mistakes are not fatal. Other simulators involve sophisticated tactile feedback devices, such as are used by the National Aeronautics and Space Administration (NASA). NASA has developed a virtual reality interface which uses gloves, called DataGloves, with electronic sensors. The sensors detect hand movement, converting it into electronic signals which are sent along fiber-optic cables. This allows the hands to interact in the virtual environment and manipulate items within it.
Games, too, are beginning to use virtual reality technology. From the simple airplane simulator to more advanced holographic projectors, simulators allow a variety of virtual environments to be explored. As the technology improves and costs come down, it is likely that virtual reality will be as common in the home as television.
