According WikiPedia, a 'plug computer is a small form factor server for use in the home or office'.
A plug computer is not only small, it uses also very little power. The Sheeva plug, for instance, uses only 7W under 100% CPU load (excluding any external drives).
More information:
http://en.wikipedia.org/wiki/Plug_computerhttp://en.wikipedia.org/wiki/SheevaPlughttp://www.cyrius.com/debian/kirkwood/sheevaplug/No page links to PlugComputer.
