TKK | Tietoverkkolaboratorio | Opetus
The term "search engine" is often used generically to describe both true search engines and directories. The difference between these two is how listings are compiled. True Search engines, such as Google and Ihmemaa, create their listings automatically while directories, like Yahoo, depends on humans on its listings. Both types of search engines are based on same basic techniques. First they find or crawl the existing web pages, then index them and finally transfer indexes to form that can be utilized effectively to find matches to a search and rank them in order of what it believes is most relevant. All search engines have the basic parts described above, but there are differences in how these parts are tuned. That is why the same search on different search engines often produces different results.In this section different worldwide (Google, AltaVista) and finnish (Ihmemaa) search engines are compared and shown their different properties.
[Previous page] [Contents] [Next page]