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It is Basically type of program that uses keywords to search for
documents that relate to these keywords and then puts the results
found in the order of relevance to the topics that was searched for,
Example:-
* Google
* Alta Vista
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Search engine are important because with over 8 billion web page
available, it would be impossible to search for the information that is
specifically needed. This is why search engines are used to filter the
information that is on the internet and transform it into results that
each individual can easily access and use within the matter of
seconds.
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Are search engine that use software programs that are called, “spider”,
“crawlers”, “Bots”. These programs can access the web pages to
categorize and analyze them and then and them in the search engine
data based, where any user can find them when searching. The crawler
based search engines are constantly updated with new webpage that
would be available in their database.
Example:
--Google
--Yahoo
--Ask.com
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Google began in January 1996 as a research project.
Founded by Larry page and Sergey Brin.
Most Popular search engine.
Google’s homepage includes a button labeled “I’m Feeling Lucky”.
When a user types in a search and click on the button the user will be
taken directly to the first search result.
Besides the main search-engine feature of the searching for text,
Google Search has more than 22 “ Special Features” like: weather, unit
conversion, currency conversion. Time. Calculator, maps and sports
scores.
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In January 1994, Jerry Yang and David Filo, Stanford University
graduates, create a web site called “David And Jerry’s Guide to the
World Wide Web”
In April 1994, “David and Jerry’s Guide to the World Wide Web” was
renamed by “Yahoo!”
Yahoo! Provide internet communication services such as
Yahoo! Messenger and Yahoo! Mail.
Yahoo! Offers social networking services such as my web,
Yahoo! Personals and Flickr
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A Question and Answer focused search engine.
Founded in 1998 by Garrett Gruener And David Warthen in
Berkeley, California.
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Are websites sectioned in Specific categories by human editors and are
then place in the “Directories” database.
Example:
*Yahoo Directory (www.Yahoo.com)
*Open Directory (www.dmoz.orz)
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They help the users search in different areas in specific types of lists
that are specialized in specific topic that would be beneficial for
narrowing down the searching process.
Example:
*Askjeeves
*Medhunt
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Are search engines that use both crawler based searches and
directory searches to obtain their results.
Example:
* yahoo.com
* google.com
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Are search engines that combine all the result from other search
engines into one big list.
Example:
* Metacrawler
* Dogpile
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1. Be Specific:
-- When searching on a search engine be more specific in wording, such as
using school science fair projects instead of science projects.
2. Use the + symbol :
-- If you ant to use two words in search, you can use the + symbol before
each word so that only web pages that have both words appear.
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3. Use Quotation marks:
-- The quotation marks are used if you want to search for specific
phrases.
4. Combining symbols: you combine all the symbols explained above
to do the search your own way.
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Boolean searches use the “Boolean operators” to combine words &
make the search topic more specific and limited for the user.
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And is equal to the + symbol
Not is equal to the – symbol
OR means that the search engines automatically returns to the words
tat you type in.
Near is equal to the putting quotes for a specific phrase such as
“Shakespeare sonnets”