How Search Engines Work

Search engines create their listings automatically when you type a word or phrase, called a "query". Search engines are indexes that are automatically assembled with the help of software programs called spiders or robots that "crawl" the Web to find pages. Once you type in a query, the search engine crawls the web and provides you with a list of web sites or "hits" of what it has found. Each search engine will provide different results.

Web Search Engines

Cuil (www.cuil.com)

Cuil, pronounced "cool" is an old Irish word for knowledge. It is a new search engine designed by former Google search architect anna Patterson and her husband Tom Costello. It claims to index three times as many web pages as Google.

Google (www.google.com)

Google claims it is the largest search engine. Google was the first to use link popularity as the primary way to rank search results for relevance. It has a famous clean look. Ads are never mixed in results.

Yahoo!Search (www.search.yahoo.com)

Yahoo was the largest search engine until 1995, when Google arrived on the scene. It uses Inktomi, Yahoo! directory, and Overture (paid results). Yahoo's directory is now subordinate to search.

Ask.com (www.ask.com)

Claims it has the best results. Good search features using Teoma technology. Quality search results. Natural language searching that allows you to type in questions to link you to the exact pages that answer your questions. Also, great for students to help narrow and broaden search queries.

MSN Search (www.msn.com)

MSN promises to revolutionize searching. It is MicroSoft's response to Google/Yahoo successes. Plans to "re-invent" search to outdo Google.

Search engine analysis provided by Joe Barker for the Infopeople Project and supported by the U.S. Institute of Museum and Library Services, Winter, 2006.

 

 

Search Engines Worth Using & Keeping an Eye On

Gigablast (www.gigablast.com)

Founded in 2000, Gigablast provides its users with unique "gigabits" of information that help to refine searching. Indexes up to 2 billion webpages. Also has the clean look like Google.

Exalead (beta.exalead.com/search)

This search engine from France brings back search results showing a small thumbnail of the actual webpage.