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Search Engines Meta Engines People Directories Subject Directories Domains explained

Contents. Search Engines Meta Engines People Directories Subject Directories Domains explained URLs explained Hypertext Language. Search Engines. Use when looking for information about a specific topic. E.g. Bastille day. When will I use them?.

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Search Engines Meta Engines People Directories Subject Directories Domains explained

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  1. Contents • Search Engines • Meta Engines • People Directories • Subject Directories • Domains explained • URLs explained • Hypertext Language

  2. Search Engines • Use when looking for information about a specific topic. E.g. Bastille day When will I use them?

  3. Search engines allow keyword searches on the World Wide Web. Information is gathered by programs called robots or spiders. Search Engines What are they? How do they work?

  4. Useful Search Engines AllTheWeb http://www.alltheweb.com/ Google http://www.google.com/ Hotbot http://www.hotbot.com/

  5. Meta engines are programs which query multiple web sources (search engines, web directories and/or other specialized databases). They do not have their own databases. They send queries simultaneously to their specified web sources (varies with each meta engine). Many of them integrate the search results and rank according tovarious criteria. Meta Engines What are they? How do they work?

  6. Meta Engines • Use these engines when you want the highest recall of documents on a specific subject. When will I use them?

  7. Useful Meta Engines Beaucoup http://beaucoup.com/ Ixquick Metasearch http://www.ixquick.com/ Profusion http://www.profusion.com/

  8. People directories are often referred to as ‘whitepages’ and include directories of email and snail mail addresses and telephone numbers. The information is gathered by robots or by submissions by individuals. People Directories What are they? How are they organized?

  9. People Directories • Use when looking for email and snail mail addresses and telephone numbers. When will I use them?

  10. Useful People Directories WhoWhere http://www.whowhere.com/ IAF (Internet Address Finder) http://www.iaf.net/ Whitepages http://wp.superpages.com/

  11. Subject Directories What are they? How are they organized? • An index or • catalog of • Web sites. • They are • organized • by humans.

  12. Subject Directories When will I use them? • Use when looking for general information about a topic. • E.g. education, medicine • Use when looking for a list of sites which • have been selected by human experts.

  13. Useful Subject Directories LookSmart http://www.looksmart.com/ Lycos http://www.lycos.com/ Yahoo http://www.yahoo.com/

  14. Domains Explained • A domain name is a meaningful and easy-to-remember “handle” for an Internet address. • The domain name system (DNS) is the way that internet domain names are located and translated into computer addresses. What are they?

  15. Domains Explained • The DNS includes: • Name of country • e.g. ca for Canada • e.g. fr for France • E.g. au for Australia • Type of organization • e.g. com for commercial • e.g. edu for educational • e.g. gov for government • Name of organization • e.g. brown for Brown University How do they help?

  16. URLs Explained • URLs are World Wide Web addresses U = Uniform R = Resource L = Locator What are they?

  17. URLs Explained • The URL for Brown University is: http://www.brown.edu • Typically a WWW address includes: • http:// - hypertext transfer protocol • www - World Wide Web • brown - name of the organization • edu - type of organization An example

  18. Web Browsers • The web browser is a software program installed on your PC that lets you look at (or “browse”) websites. • Popular browsers include: • Internet Explorer, Netscape, and Mosaic. What are they?

  19. Hypertext links • The Web is based on a system called hypertext markup language (HTML). • Hyperlinks are used to link information within documents and between documents on the World Wide Web. What are they?

  20. Hypertext links • Hyperlinks appear as: • Icons • Images • Text • Text links are commonly a different color and are usually underlined. Recognizing hyperlinks

  21. Works Cited Barlow, L. “How Search Engines Work.”The Spider’s Apprentice: A Helpful Guide to Search Engines.22 Sept. 2001.Monash Information Services. 4 Oct. 2001 <http://www.monash.com/ spidap4.html/>. Henninger, M. Don’t Just Surf: Effective Research Strategies for the Net. Sydney: U of New South Wales Press Ltd, 1999. Tyner, R. “Internet Search Tools & Techniques.” 19 June 2001 M.L.S. Okanagan U College. 4 Oct. 2001 <http://www.sci.ouc. bc.ca/libr/connect96/search.htm>.

  22. Created & Designed bySyba Signs P/Lwww.sybasigns.com.au C 2001 Syba Signs

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