WebCrawler Keyword, boolean expressions. Some folks have put together Web pages that contain a collection of search engines or tools. Several search engines are accessed, results are obtained and compiled. When searching for information related to a topic, a directory might be better to use are several ways to find information that's part of the World Wide Web. Search engines are more appropriate to finding information on a specific topic and often bring together items that would be listed in different categories in a subject tree.
Web pages are also available containing collections of search engines.
Some meta-search tools, which pass the search phrase to several search engines are available as well. For more information and resources on these topics take a look at Finding Information on the Web - Directories and Searching . This goes along with Chapter 6 of Learning to Use the World Wide Web. A discussion group or list is essentially a group of people communicating through e-mail. Messages sent to the group are broadcast to every member.