Things I learned in Week 5

Well, I have learned a lot today,a lot about Internet Search Facilities. Previously, I just knew about and used Baidu and Google, though I thought they are useful enough for research. However, I realized that for more professional searches Google is not enough. Besides, since everyone uses Google, the search results of the same topic will be the same, and not unique.

So, what are the difference between Internet Search Facilities?
Search engines---most commonly used (such as google & askjeeves),but a single search engine can only find a portion of the relevant web pages.


Meta Search Engines---multi-search engines (such as Jux2, IxQuick, Kartoo, Mamma, MetaCrawler & Vivisimo) which combine google, yahoo...The searching ranges are more bride.However, it is not always stable. (I cannot open the Kartoo for the whole morning in the class) 


Subject Directories---subject catalogs (such as Yahoo Directory & Galaxy )


Invisible Web---Databases (such as Spark )


Tips:
For familiar topic, search engines and meta search engines are good choices.

•For unfamiliar topic, we can use subject directories as it allows us to browse through relevant links .

•For specialized information, we have to use invisible web.

Furthermore, there are three useful guide websites:

http://infopeople.org/

http://www.searchengineshowdown.com/

http://www.noodletools.com/