| A | B |
| Head Mounted Display | Device on top of helmet signals head movements |
| Data Glove | Some use fiber optic cables. |
| Wand | Is simplest of interface devices |
| Boom | Is similar to HMD – but no helmet |
| Cave | One of the newest, most "immersive" virtual environments |
| Shared Virtual Environments | All users see the same virtual environment from their respective points of view |
| Virtual Reality | is a simulated environment; involves 3D Graphics |
| Telepresence | This technique is used in the movie industry to create animations by using body sensors to record human motions and transfer them to animated subjects |