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Finding Information on the Internet. Irwansyah. Why Search the Web?. A simple answer is that the Web is too large and unorganized to find much useful information. Typing in the web address of a known page (URL) Search engines Directories (or web catalogues) Browsing. - PowerPoint PPT Presentation
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Finding Information on the Internet
Irwansyah
Why Search the Web?
A simple answer is that the Web is too large and unorganized to find much useful information.
Alternative Methods for Finding Information• Typing in the web address of a known page (URL)• Search engines• Directories (or web catalogues)• Browsing
Web ‘addresses’ or URLs
The most efficient method of finding information on the internet is through typing the web address or URL directly into the web browser.
How do We Know the URL?
• A word of mouth recommendation• From advertisement or company
promotional literature• Simply making a good guess
How Web Search Engine Work
Search engines use special automatic tools known as spiders, crawler or robots to index web pages of registered sites.
What Search Engines Search
• Content• Tags
– Keyword– Description– Title– Heading– Links
What Search Engines Ignore• Frames• Scripts• Java Applets and Plug-Ins• Server-Generated Pages• Forms• Images• Deeply Linked Pages• Reorganization and Broken Links
Major Search Engines
• Google – http://www.google.com • Yahoo – http://search.yahoo.com • MSN – http://search.msn.com • AltaVista – http://www.altavista.com• Alltheweb – http://www.alltheweb.com
Alternative Search Engines
• Vivísimo – http://www.vivisimo.com • Dogpile – http://www.dogpile.com • Ask.com or AskJeeves.com –
http://www.ask.com • SurfWax – http://www.surfwax.com• Ixquick – http://www.ixquick.com
Mobile Search Engines
• http://mobile.google.com • http://mobile.yahoo.com/search • http://mobile.msn.com
Searching with Google
• Think “full text”war of 1812 economic causes
• Specify exact phrases“tom bates”
• Exclude or include a wordproliferation –nuclearobama +hussein
Searching with Google
• Web page titleintitle:hybrid
• Website or domainsite:whitehouse.gov
• File typefiletype:ppt site:edu “global warming”
Nine Very Cool Google Tricks
1. Definitionsdefine:wireless LAN
2. Calculator2+2
3. Phonebookphonebook: ansonia veterinary center NY
Nine Very Cool Google Tricks 4. Street Maps
9 Princeton St Boston MA 021285. Stock Quotes
stock quotes:MSFT 6. Patents, Tracking IDs, and Other Numeric Goodies
patent 5123123
Nine Very Cool Google Tricks 7. Weather
weather bloomington, indiana 8. Q&A
Q&A:population of south korea 9. Movies
movie: holy grail
Interpreting the Results
When Not to Use Google
• Google doesn't cluster results• Google isn’t good enough to find a person's email
address• Google isn't the best place to find what an abbreviation
stands for• Some topic-specific directories are simply more fine-
tuned than Google's regular full-text search• When working on an in-depth research project (like a
college thesis), Google doesn't help you catalog multiple search results, or let you take notes on interesting sites.
Web Catalogues or Directories
Massive online catalogs that are edited, sorted, and organized by humans
Major Web Directories
• http://directory.google.com • http://dir.yahoo.com • http://dmoz.org
Practical Tips for Managing Information
1. Using bookmarks2. Printing information3. Saving text for subsequent reading or
printing4. Saving an image or diagram
End