Summary of the world's 18 major search engines

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Free to do nothing, sorting out the search engine, to learn more about the search engine related things, increase the knowledge. Why do you think the following search engines are major? because they are either very famous or very widely used. For site managers, it's important to rank on these famous search engines, because it's possible to bring potentially endless traffic to your site.

For information searchers, these well-known and business-background search engines can find more reliable results. They maintain a better, and frequent updates, can keep pace with the rapid development of the entire network.

The list below is not all the search engines that we call "really" crawl the entire web. For example, both Yahoo and open directory are "categorized" by human-edited content. In fact, the following 18 main services provide both search and classification information, although each has its own focus.

1. AOL Search

http://search.aol.com/

AOL search allows users of AOL's Web site to look for their entire network and AOL's own information. The "external" version listed above does not include the content of AOL itself. Their catalog and site information from Open Directory (see below), Inktomi (see below) provides machine search results (crawler-based results) as a complement to the catalog. Before AOL search was released in October 1999, AOL was using the AOL Netfind supported by Excite.

2. AltaVista

http://www.altavista.com/

According to the number of pages retrieved, AltaVista has been one of the largest search engines on the Internet. It's comprehensive coverage and offers a variety of advanced search commands that make it one of the favorites of online searchers. It also developed a number of features for novice users, such as Ask AltaVista, from ask Jeeves (see below). The categories used by AltaVista are mainly from open directory. AltaVista began operation in December 1995, initially owned by Digital, then 1998 Digital was Compaq purchased, AltaVista was responsible for the Compaq, and then it became an independent company, now controlled by the CMGI group.

3. Ask Jeeves

http://www.askjeeves.com/

Ask Jeeves is a manual search service that aims to point to specific pages that answer your questions. If it does not find a relevant answer in its own database, it provides pages found from other search engines. The service began its beta test in mid-April 1997 and was fully operational on June 1, 1997. The results of Ask Jeeves also appear in AltaVista (see above).

4. Direct Hit

http://www.directhit.com/

Direct hit works primarily with other search engines to refine their search results to provide services. It is refined by monitoring user clicks on their own search results, and those who get more user clicks will rise to a higher position in direct hit's rankings. Therefore, this service is also known as the "popularity engine". Direct hit's technology is currently well applied in HotBot, and it also refines Lycos search results, which is also an option in LookSmart and MSN Search. In addition the direct hit company itself retrieves (crawls) the network to optimize its own database, which can be viewed through the links above.

5. Excite

http://www.excite.com/

Excite is one of the most popular search services on the Internet, with a medium-sized retrieval page and, where appropriate, a combination of non-network data, such as corporate information and sporting results, in its search results. Excite began providing services in the second half of 1995, growing very quickly and annexing two competitors, July 1996 annexation of magellan,1996 November acquisition of WebCrawler, the two companies are still operating as an independent service.

6. FAST Search

http://www.alltheweb.com/

Formerly known as the All Web, the goal of FAST search is to retrieve the entire network. It was the first search engine to search through 200 million of pages, and the Norwegian company behind FAST Search also supported Lycos's MP3 search engine. FAST search was launched in May 1999.

7. Go/infoseek

http://www.go.com/

Go is a portal that is launched by InfoSeek and Disney, which provides features such as personalized customization, free mail, and so on, and consolidates the previous InfoSeek search service. Information searchers will find that the Go search engine gives high quality results for many general queries thanks to its unique ESP search algorithm. It also has a great manual editing category. Go is officially launched in 1999 years, and it has nothing to do with the Goto described below. The previous InfoSeek service began in early 1995.

8. GoTo

http://www.goto.com/

Unlike other major search engines, Goto sells its rankings on its main catalogue. A company can increase its ranking in search results by paying, and Goto thinks this can enhance the relevance of search results. The Goto engine's free search results come from Inktomi. Goto was released in 1997 and incorporates the world Wide Web Worm, previously developed by Colorado University. It shifted to the current pay-for-ranking model in February 1998, followed by a inktomi instead of www worm for free search. Goto has nothing to do with the Go (Infoseek) mentioned earlier.

9. Google

http://www.google.com/

Google is a search engine that attaches great importance to link popularity, and the breadth of links in its search results ranking algorithm is heavy. This is in the query some very general words (such as "Car" "travel", etc.) is very good, you can get more valuable results, because the general good site, people link more.

HotBot

http://www.hotbot.com/

Like AltaVista, HotBot is also a favorite engine for searchers because of its huge retrieval page and many of its advanced search features. In most cases, the first page of the HotBot search results comes from the direct hit service (see above), followed by the results from inktomi--, which are used by many search services. HotBot directory information is from open directory (see below). HotBot was released by Wired company in May 1996 to enter the search engine market, Lycos bought the Wired Digital company in October 1998, but HotBot still operates as an independent search service.

Iwon

Http://www.iwon.com

The company's background is that the Cbs,iwon catalog is automatically generated by Inktomi, and Inktomi also offers traditional machine search results. Throughout its operations, Iwon is different from other major service providers, using a business model that rewards daily, weekly, and monthly bonuses. Officially operational in the fall of 1999.

Inktomi

http://www.inktomi.com/

Initially, there was a Inktomi search engine at the University of California, Berkeley. The developers then created their own company with the same name and created a new database that was just used to support HotBot, and now Inktomi's retrieval database also supports some other search services. These engine services use the same data source for Inktomi, but the query results are different. For the general user can not directly query the Inktomi database, it is only open to its partners, while the engine in the call Inktomi data using their own algorithms and commands.

LookSmart

http://www.looksmart.com/

LookSmart is a manually edited site directory. In addition to being an independent service, LookSmart also provides the contents of the catalog for MSN Search, Excite, and other partners. When the LookSmart itself's database does not find the result, it uses the search results provided by AltaVista. LookSmart was released independently in October 1996, then managed by Reader's Digest (reader ' s Digest) for a year and then the company's management bought back control of the company.

Lycos

http://www.lycos.com/

Lycos was originally a search engine, its own search (Spider) network. Then, for 19,994 months, it turned to a catalog pattern similar to that of Yahoo, whose main classification information came from Open directory, followed by direct hit or Lycos's own data. Lycos bought its rival, HotBot, in October 1998, but HotBot continued to operate independently.

MSN Search

http://search.msn.com/

Microsoft's MSN Search service is a categorized directory supported by LookSmart, with other search results from AltaVista, as well as the integration of RealNames and direct hit data. MSN Search provides a unique way to save the results of previous queries for Internet Explorer 5 users.

Netscape Search

http://search.netscape.com/

The results of Netscape search come mainly from Open Directory and Netscape's own "Smart browsing" database, which is doing a good job of querying "official" sites. The second search results are from Google. Many other search engines are also integrated into Netscape's Netcenter portal.

Northern Light

http://www.northernlight.com/

Northern Light is a favorite search engine for another online researcher, which has one of the largest retrieval databases on the Internet, along with the ability to categorize documents according to topics. Northern Light also has a large number of "special" file data, which are difficult to retrieve from the generic search robot (searching engine spiders), which comes from many data sources, including news lines, magazines and internal databases, which are free of charge, But to read them requires a fee, a maximum of $ $, and, of course, no payment for general public information. Northern Light began its external service in August 1997.

Open Directory

http://dmoz.org/

The Open Directory uses the obligation editor to classify Web sites, initially called newhoo,1998 June, and December 1998 by Netscape, which ensures that anyone who adheres to an Open License agreement can use the content of that directory. Netscape itself is the first license agreement, Lycos and AOL search fully use the data of Open directory, while AltaVista and HotBot also integrate the results of open Directory in their search results.