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Old 09-21-2016, 03:42 AM   #1 (permalink)
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Default What are the kinds of Search Engine?

What are the kinds of Search Engine?
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Old 09-27-2016, 11:21 AM   #2 (permalink)
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Default Re: What are the kinds of Search Engine?

Different types of search engines

When people mention the term "search engine", it is often used generically to describe both crawler-based search engines and human-powered directories. In fact, these two types of search engines gather their listings in radically different ways and therefore are inherently different.

Crawler-based search engines, such as Google, AllTheWeb and AltaVista, create their listings automatically by using a piece of software to “crawl” or “spider” the web and then index what it finds to build the search base. Web page changes can be dynamically caught by crawler-based search engines and will affect how these web pages get listed in the search results.

Crawler-based search engines are good when you have a specific search topic in mind and can be very efficient in finding relevant information in this situation. However, when the search topic is general, crawler-base search engines may return hundreds of thousands of irrelevant responses to simple search requests, including lengthy documents in which your keyword appears only once.

Human-powered directories, such as the Yahoo directory, Open Directory and LookSmart, depend on human editors to create their listings. Typically, webmasters submit a short description to the directory for their websites, or editors write one for the sites they review, and these manually edited descriptions will form the search base. Therefore, changes made to individual web pages will have no effect on how these pages get listed in the search results.

Human-powered directories are good when you are interested in a general topic of search. In this situation, a directory can guide and help you narrow your search and get refined results. Therefore, search results found in a human-powered directory are usually more relevant to the search topic and more accurate. However, this is not an efficient way to find information when a specific search topic is in mind.

Good luck to you,
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Old 10-03-2016, 01:55 AM   #3 (permalink)
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Default Re: What are the kinds of Search Engine?

Search Engines Types

AltaVista - Crawler-based search engine
LookSmart - Human-Powered Directory
Open Directory - Human-Powered Directory
Yahoo - Human-Powered Directory, also provide crawler-based search results powered by Google
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Old 11-04-2016, 05:22 AM   #4 (permalink)
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Default Re: What are the kinds of Search Engine?

Thanks for Sharing
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