Hardware: Display devices
Display devices
Head-mounted displays
Surround systems
Booms
Augmented reality / wearable computing
Simulators
Semi-immersive
Desktop (fishtank VR)
Game systems
Internet based / browsers
Tele-operation / tele-robotics
Other output devices
Hydraulic ride
Immersive sound
Haptic feedback
* image copied from ``Design of Virtual Environments'', Rory Stuart, McGraw-Hill, 1996
