Web crawlers are generally software robots which scan through the millions of web sites to construct some kind of intelligent index to aid searches. BTW, in my opinion, <A HREF="http://www.google.com" TARGET="_blank">www.google.com</A> is the best search engine.
I've been trying to reduce the number of email addresses I have, one of the criteria being "if it doesn't support POP, it goes".
--PPD