Search Engines are tools for searching the Internet for keywords entered by the user. They all work a little differently and produce different search results. Each search engine has a Help screen to tell you how best to construct your search.
Natural language searching (you can type in a question instead of using keywords.) The knowledgebase includes sites that have been reviewed for their speed in loading, reliability of content, unbiased information content and ease of use.
A search engine by Microsoft. It gives related searches in order to assist in your search.
One of the best of the meta-search engines (which allows you to search information from a variety of search engines all at once), Dogpile presents your results in a very organized fashion.
Google offers a unique ranking system which provides remarkably relevant results. Developed at Stanford University.
Simple meta-search provides single-line list of items retrieved.
One of the oldest and easiest to use.