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Two Common problems in searching the Web are; Search engines usually return many more hyperlinks than it is possible to access with many of the hyperlinks containing unrelated information. Different search engines find different pages because each engine has its own database of hyperlinks and its own method of determining a match.
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HOW TO DO USE SEARCH ENGINES
SEARCH ENGINES• Search engines is a program that searches a database of
Web Pages for words that you supply and then lists hyperlinks to a page that contain those words.
• Examples include;
• Google, Bing, Yahoo, AltaVista, cuil, Excite, Go.com, AllTheWeb, Galaxy, search.aol, LiveSearch, Lycos, GigaBlast, AlexaInternet, HotBot, Excite, Snap, Ask Jeeves, Go Network, GoTo, WebCrawler, About, Looksmart,
SEARCH ENGINES CONT…• Two Common problems in searching the Web are;• Search engines usually return many more hyperlinks than it
is possible to access with many of the hyperlinks containing unrelated information.
• Different search engines find different pages because each engine has its own database of hyperlinks and its own method of determining a match.
SUBJECT TREE OR INTERNET GUIDE• Some search provide a list of sites separated into
categories
• Yahoo uses this feature
• (i.e. Art & Humanities
• – News & Media
• – Business & Economy
• – Recreation & Sports)
ADVANCED SEARCH TECHNIQUES• Boolean Logic• Listing hawaii in the AltaVista search engine return
2,000,000 matches,
• but the criteria hawaii + resort lowers the number to 300,000.
ADVANCED SEARCH TECHNIQUES• The “+” (Plus Sign)• Can be used to limit a search to only those web pages
containing those two words.
• It is possible to use more than one + To refine a search i.e. florida+hotel+pool
• Returns only web sites containing those three words
• (NOTE): don’t use a space between the + and the next word
ADVANCED SEARCH TECHNIQUES• You can also use the word “and” in place of the + (plus
sign)
• A common search technique is to use several synonyms for a word (i.e. house cottage bungalow)• or
• The word “or” can be used in place of a space
ADVANCED SEARCH TECHNIQUES• - (minus sign) is used to exclude unwanted web pages.• i.e. Shakespeare – play Returns hyperlinks to pages
containing the word Shakespeare, but eliminates pages that also contain the word “play”.
• not• Can be used in place of the – (minus sign)
ADVANCED SEARCH TECHNIQUES• Examples:
• horse+buggy-carriage• tuna salmon-salad• recipe chicken-soup• university+connecticut-yale