This week I would like to discuss about the web search engines. There are a lots of web search engines such as Google Scholar, Mamma.Com, Eric Digest, Yahoo.Com, Dogpile Search, AltaVista, Web Crawler, AlltheWeb.Com and so on. Furthermore, I would like to discuss the differences and similarities between the popular web search engines.
Web Search Engine?
So, first of all I would like to define the web search engine. What is web search engine? What for it use by people? According to Wikipedia a “Web search engine is a tool considered searching for information on the World Wide Web. The search results are usually presented in a list and are commonly called hits. The information may consist of web pages, images, information and other types of files. Some search engines also mine data available in news books, databases, or open directories. Unlike Web directories, which are maintained by human editors, search engines operate algorithmically or are a mixture of algorithmic and human input”. Web search engines work by storing information about many web pages, which they retrieve from the WWW itself.
The Examples of Web Search Engines
Mamma.Com is a site owned and operated by Copernic Inc. Mamma.com is a "smart" metasearch engine — every time you type in a query Mamma simultaneously searches a variety of engines, directories, and deep content sites, properly formats the words and syntax for each, compiles their results in a virtual database, eliminates duplicates, and displays them in a uniform manner according to relevance. It's like using multiple search engines, all at the same time. It created in 1996 as a master's thesis, Mamma.
Google scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations. Google Scholar helps you identify the most relevant research across the world of scholarly research. At the end of 2004, Google launched the beta version of a new service, Google Scholar.
Eric Digest provides one way to access the ERIC Digests (education articles) produced by the former ERIC Clearinghouse system. It contains short reports (1,000 - 1,500 words) on topics of prime current interest in education. There are a large variety of topics covered including teaching, learning, libraries, charter schools, special education, higher education, home schooling, and many more.
Yahoo.Com is an Internet portal that incorporates a search engine and a directory of World Wide Web sites organized in a hierarchy of topic categories. It provides both new and seasoned Web users the reassurance of a structured view of hundreds of thousands of Web sites and millions of Web pages. It also provides one of the best ways to search the Web for a given topic. Yahoo was founded by Jerry Yang and David Filo in January 1994 and was incorporated on March 1, 1995.
The similarities of the web search engines
The above search engines function as a tool for searching information. They provide a lots of information about the things that searcher need to know. Furthermore, all the web search engines are in electronic text form. People easily can find any information in anytime.
The differences of the web search engines
The Google Scholar and Eric Digest are more based on academic researches and sources. Both web pages really very helpful for the students. Students can obtain so much of information by using this kind of search engines. On the other hand, Mamma.Com and Yahoo.Com link for searching entertainment and other information. They are classified web pages in categories such as images, video, audio, news and so on. But the most important thing in Yahoo.com is advertisement. Moreover, all of the search engines have different interface. The Yahoo.Com is very colorful when compare with other web search engines. It's look more interest and easily attract the web users. So, these are the differences that i found in all the web search engines.