A general list of topics is presented and you work your way thru its subdirectores to find the topics you're looking for. My architectural pages is thru, business, corporations, art, architecture, and firms. This lists about 70 architectural firms. Another way to find things on the internet is thru the search engines where you type in a key word, or group of words. The engine will then search for your topic.
Search engines are specialized.
Some search only titles, some search authors, some search topics, some search the document text looking for the key words, and some are dedicated to searching only places that post certain topics. There are also yellow pages and white pages with search engines to find people or email addresses. You can also buy yellow pages at your local software store. The internet is a great tool that is in its infant stages. It has communications capabilities that are hardly being tapped.