Alta Vista :
http://www.altavista.digital.com

YAHOO :
http://www.yahoo.com

Laycos :
http://www.laycos.com

InfoSeek :
htpp://www2.infoseek.com

Galaxy :
http://galaxy.einet.net/galaxy.html

INKTOMI :
http://inktomi.berkley.edu/query.html

WebCrawler :
http://www.webcrawler.com

The Whole Internet Catalog :
http://gnn.com/gnn/wic/wics/index.html

CUI W3 Catalog :
http://cuiwww.unige.ch/w3catalog

WWW Wirtual Library :
http://www.w3.org/hypertext

Aliweb :
http://web.nexor.co.uk/aliweb/doc/aliweb.html

Infohiway :
http://www.infohiway.com

Word Wide Web Worm :
http://wwwmcb.cs.colorado.edu/home/mcbryan/wwww.html