Concise descriptions of the directory services WHOIS,
Knowbot, and NETFIND along with other aids to finding email addresses may be found in The Internet Companion, 128-33, and in Crossing the Internet Threshold, 43-44.
Knowbots. Automated systems for collecting, screening, and organizing data are called
knowbots (short for knowledge robots).
Natural Interaction with Robots,
Knowbots and Smartphones.
In order to gather the needed clues, the users match knowledge with a series of
KnowBots who produce a series of questions in the areas of history, geography, life science, physical science, mathematics, English, art and music.
However, the multiplier attainable by software-based "
knowbots" is virtually unlimited, and thinking in terms of millions of active agents per user is not unreasonable.