Chapter 8 How do search engines work?

      Yahoo


                                                           

http://answers.yahoo.com/question/index?qid=20080828165244AAeLn3L

search engines work by you typing in what your searching for and the engine will search the whole web looking for the words you typed that matches the sites and these sites will pop up. the more you type, the more specific it gets and accuracy




Google


                                                               


 http://www.google.com/technology/pigeonrank.html
As a Google user, you're familiar with the speed and accuracy of a Google search. How exactly does Google manage to find the right results for every query as quickly as it does? The heart of Google's search technology is PigeonRank™, a system for ranking web pages developed by Google founders Larry Page and Sergey Brin at Stanford University  Building upon the breakthrough work of B. F. Skinner, Page and Brin reasoned that low cost pigeon clusters (PCs) could be used to compute the relative value of web pages faster than human editors or machine-based algorithms. And while Google has dozens of engineers working to improve every aspect of our service on a daily basis, PigeonRank continues to provide the basis for all of our web search tools.






Ask
        


                                                                    
http://www.ask.com/web?q=How+Do+Search+Engines+Work&o=102140&qsrc=2902&l=dir 


Search engines are one of the most vital tools you can use when surfing the world wide web. They act as a portal to the vast quantities of information available online. When search engines were in thei






Wikipedia






                                                    



          http://en.wikipedia.org/wiki/Web_search_engine

   A web search engine is designed to search for information on the World Wide Web and FTP servers. The search results are generally presented in a list of results often referred to as SERPS, or "search engine results pages". The information may consist of web pages, images, information and other types of files. Some search engines also mine data available in databases or open directories. Unlike web directories, which are maintained by human editors, search engines operate algorithmically or are a mixture






  Bing





                                            
                                                       http://www.bing.com/community/site_blogs/b/webmaster/archive/2009/09/03/search-engine-optimization-for-bing.aspx   


                     
       When I attended both SMX Advanced in Seattle back in June and SES San Jose just a couple of weeks ago, I heard a lot of questions from webmasters about Bing, especially pertaining to search engine optimization issues. Typically these included:

• I want to do SEO for Bing—where should I start?
• How is Bing different in terms of SEO?
• What do webmasters need to know and do?
• Are there any insider tips for successful ranking?

I’ll tackle these questions by providing some useful, baseline information and include pointers to more detailed, pertinent docs.
As you know, Bing is an evolution in the search engine space. With its innovative, new user interface (UI) design bringing new depth and opportunities for searchers, they can now quickly find the information they seek when they search the Internet. New UI features, such as Quick Tabs, Related Searches, and Document Preview (to name just a few), surface more information and present more opportunities to discover what searchers want to know so they can make more informed decisions more quickly. As a result, we describe Bing as a decision engine.