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A “holodeck” is an enclosed room in which objects and people are simulated by a combination of transported matter, replicated matter, tractor beams, and shaped force fields onto which holographic images are projected.  Most holodeck programs shown in Star Trek episodes run in first person “subjective mode”, in which the user actively interacts with the program and its characters. The user may also employ third-person “objective mode”, in which he or she is “apart” from the actual running of the program and does not interact with it (all of the program’s characters will ignore the user as if he or she was not there.  (READ MORE about “Holodeck”)

Virtual reality (VR) or also called Immersive Multimedia is a computer-simulated environment that can simulate physical presence in places in the real world or imagined worlds.  (READ MORE about “Virtual Reality”)