Also ideal for industry research. For industries begin by clicking on US sectors then proceed with industry index. The most elaborate business and industry search engine on the Internet. Do not miss this one. Company Sleuth One of the most recommended company search engines on the Internet.
Registration is free but required.
Supposedly inside information not available elsewhere. It gives you the ownership structure in the information. Globalbiz Directory Excellent business search engine that allows a search by SIC number. Comfind All Business Directory powered by Comfind. Very elaborate indexed directory for business.