About Search Engines
After keying in your topic and/or keyword in the search box, the search engine will retrieve and post on a new page a list of "hits" (possible sources of the information requested)

About Subject Directories
A subject directory is like an index in a book. However, instead of page numbers in a book, each topic links to web sites. Subject directories are organized by main topics to subtopics. Many directories have a search engine that can be used to search the directory's collection.

About Dewey Directories
Dewey directories are like subject directories, except instead of being organized by the subject, they are organized by  the Dewey Classified system. LEARN MORE about the Dewey Decimal Classification System for libraries.