© 2000 by Hal Berghel - all rights reserved. All requests for reproduction and/or distribution of this electronic document should be submitted via Email to the author (hlb at berghel dot net).
This is a draft version (preprint) of material which was later published in substantially the same form in IEEE Computer, January, 2001. The published version is a copyrighted feature of IEEE Computer. All requests for reproduction and/or distribution of the published version should be directed to the IEEE Computer Society.