From EduTechWiki - Reading time: 2 min
This is a short overview entry with pointers to more specialized articles in this wiki. It also includes some general links and reference.
(Note: Maybe all these articles ought to be reorganized at some point - Daniel K. Schneider 25 August 2008)
A virtual environment is a "place" containing things that can be manipulated and people. It conveys a sense of presence.
Types of virtual environments (internal links you can follow up in random order):
See also related conceptual issues, e.g.:
See Raph Koster's excellent Online World Timeline
There is no real consensus on what constitutes a virtual environment. See also Benford's categorization of shared spaces.
Here is a picture made by DSchneider that shows a variety of such environments and their potential for education: