A search engine or search service is a program designed to help find information stored on a computer system such as the World Wide Web, inside a corporate or proprietary network or a personal computer. The search engine allows one to ask for content meeting specific criteria (typically those containing a given word or phrase) and retrieves a list of references that match those criteria. Search engines use regularly updated indexes to operate quickly and efficiently. Without further qualification, search engine usually refers to a Web search engine, which searches for information on the public Web. Other kinds of search engine are enterprise search engines, which search on intranets, personal search engines, which search individual personal computers, and mobile search engines. However, while different selection and relevance criteria may apply in different environments, the user will probably perceive little difference between operations in these. Some search engines also mine data available in newsgroups, large databases, or open directories like DMOZ.org. Unlike Web directories, which are maintained by human editors, search engines operate algorithmically. Most web sites which call themselves search engines are actually front ends to search engines owned by other companies.

History

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The very first tool used for searching on the Internet was Archie. (The name stands for "archive" without the "v", not the character from the 'Archie' comic book series). It was created in 1990 by Alan Emtage, a student at McGill University in Montreal. The program downloaded the directory listings of all the files located on public anonymous FTP (File Transfer Protocol) sites, creating a searchable database of filenames.

While Archie indexed computer files, Gopher indexed plain text documents. Gopher was created in 1991 by Mark McCahill at the University of Minnesota. (The program was named after the school's mascot). Because these were text files, most of the Gopher sites became Web sites after the creation of the World Wide Web.

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Search Engines - Twitter Search

How effective is the SEO techniques? How much can you fool the search engines and for how long! Search engines have always kept changing...
JayKinker (Jay Kinker) Sat, 07 Nov 2009 17:45:46 -0000
How effective is the SEO techniques? How much can you fool the search engines and for how long! Search engines have always kept changing...
You Can Get Tons Of Free Traffic From Search Engines!=>http://tinyurl.com/yg7p8p6
kanga_sa (Barbara Hentschke) Sat, 07 Nov 2009 17:32:42 -0000
You Can Get Tons Of Free Traffic From Search Engines!=>http://tinyurl.com/yg7p8p6
Dominate The Search Engines With Quality Links To Your Website.: Get Top Search Engine Rankings By Automaticall.. http://bit.ly/4DUVmP
cbafffm (cbafffm) Sat, 07 Nov 2009 17:31:06 -0000
Dominate The Search Engines With Quality Links To Your Website.: Get Top Search Engine Rankings By Automaticall.. http://bit.ly/4DUVmP
Creating a website with content that draws the attention of search engines is central to creating a productive .. http://bit.ly/GIWXe
ClickBankNiches (Firdaus Masudi) Sat, 07 Nov 2009 17:31:00 -0000
Creating a website with content that draws the attention of search engines is central to creating a productive .. http://bit.ly/GIWXe
@sarahruthtoday Search Engines, more like an actual website. Blogger is great, but we are growing steadily and need more options.
SITSgirls (Tiffany ) Sat, 07 Nov 2009 17:30:56 -0000
@sarahruthtoday Search Engines, more like an actual website. Blogger is great, but we are growing steadily and need more options.
tweeting! attended class on social media/search engines yesterday. Vowed to tweet for a week: Will tweets clutter or add to my life?
rejuvo (debbie b) Sat, 07 Nov 2009 17:30:54 -0000
tweeting! attended class on social media/search engines yesterday. Vowed to tweet for a week: Will tweets clutter or add to my life?

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