Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
What are Search Engines?
It is basically a type of program that uses keywords to search for documents that relate to these keyword and then puts the results found in the order of relevance to the topic that was searched for.
Examples:
-- Google-- Alta Vista
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
Importance of search engines
Search engine importance because with over 8 billion web pages 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.
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
Types of search engines
Crawler based search engines
Directories
Specialty search engines
Hybrid search engines
Meta search engines
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
Crawler based search engines
Are search engines that use software programs that are called, “Spiders”, “Crawler”, “Robots”, “Bots”. These program can access the web pages to categories and analyze them and then add them in the search engine data base, where any user can find the when searching. The crawler based searched engines are constantly updated with new webpage that would be available in their data base.
Example:-- Yahoo-- Ask.com
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
Google Google began in January 1996 as a research project Founded by Larry page and sergey Brin Most popular search engine Google’s homepage include a button labeled “I’m
feeling lucky” when the user type in the search and click on the button the user will be taken directly to the first search result
Beside the main search engine feature of searching for text, Google search has more than 22 “Special feature”
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Yahoo
In January 1994, Jerry Yang and David Filo, Stanford University graduates, created a website called “David and Jerry’s Guide to the world wide web”, in Sunnyvale, California.
In April 1994, “David and Jerry’s Guide to the world wide web” was renamed to “yahoo!”
Yahoo! Provides internet communication service
Yahoo! Offers social networking service.
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Ask.com
A question and answer focused search engine
Founded in 1998 by Garrett Gruener and David
Warthen in Berkeley, California.
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
Directories
Are websites sectioned in specific categories by human editors ad are then placed in the “Directories” database.
Example:--Yahoo directory ( www.yahoo.com)--Open Directory (www.dmoz.org)
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
Specialty search engine
They help the user 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
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
Hybrid Search Engines
Are search engines that use both crawler based searches and directory searches to obtain their results.
Example:--yahoo.com--google.com
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
Meta Search Engines
Are search engines that combine all the results from
other search engines into one big list
Example:
--Metacrawler
--Dogpile
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
How to use Search Engines
Be specific:--When searching on search engine be more specific in wording.
Use the + symbol & - symbol:--If you wants to two words in search, you can use the + symbol
before each word so that only web pages that have both word appear. On the other hand you can use the – symbol if you are looking for a topic.
Use quotation marks Combining symbols: you can combine all the symbols explained
above to do the search your own way.
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
Boolean Searches
Boolean searches use the Boolean operators to
combine words and make the search topic more
specific and limited for the user.
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
Boolean Operators
And Is equal to the + symbol
Not is equal to the – symbol
Or means that the search engines automatically return
to the words that you type in.
Near is equal to putting quotes for a specific phrase
such as “Shakespeare sonnets”
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
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Ambala Cantt-133001
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Ph. No.: 9729666670, 8222066670
&0171-4000670
Email ID: [email protected]
Website:
Ph. No.: 8222066670, 4000670 Website: www.batracomputercentre.com
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