WEB SEARCHING

Posted in | at 15:09

What is web browser ?


1.A web browser is a software application that enables a user to display and interact with text, images, and other information typically located on a web pages at a website on the world wide web or a local area network.


2.Software that display web pages.


3.Software that gives a user access to the world wide web.Web browser often provide a graphical interface that lets users click buttons, icons, and menu option to view and navigate web pages.


What can you do with web browser ?


1.Browse the web if you know the URL
2.Searching the web using search tools.

  • Search engine
  • Subject directories
  • Name directories
  • Meta-searchers
  • Specialized Search Tools and Searchable Databases
  • And others



Search Engine
  1. Software that enable users to search the internet using keyword.
  2. A search engine is a computer program that does the following:
  • allow user to submit a query that consist aword.
  • search the database
  • return the list of suitable URLs which match your query
  • allow user to revise or resubmit.

Directories

1.Subject
  • built by human selection -- not by computers or robot programs.
  • organized into subject categories, classification of pages by subjects -- subjects not standardized and vary according to the scope of each directory.
  • NEVER contain full-text of the web pages they link to -- you can only search what you can see (titles, descriptions, subject categories, etc.) -- use broad or general terms.
  • small and specialized to large, but smaller than most search engines -- huge range in sizeoften carefully evaluated and annotated (but not always!!).
  • List of subject directories http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/SubjDirectories.html
      Meta-search
       Search more than search engine and/or subject directory at once and then compile the results in a sometimes convenient display, sometimes consolidating all the results into a uniform format and listing. 

Search techniques
  •          Use subject directories.
  • Use implied and full Boolean logic, phrase searching, truncation, and field searching effectively.
  •         Boolean  "operators" such as "AND," "OR," "AND NOT" and sometimes "NEAR." AND requires all terms appear in a record. OR retrieves records with either term. AND NOT excludes terms. 

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