Search Engine History------

Google-

By January of 1996, Larry and Sergey had begun collaboration on a search engine called BackRub, named for its unique ability to analyze the "back links" pointing to a given website. Larry, who had always enjoyed tinkering with machinery and had gained some notoriety for building a working printer out of Lego™ bricks, took on the task of creating a new kind of server environment that used low-end PCs instead of big expensive machines. Afflicted by the perennial shortage of cash common to graduate students everywhere, the pair took to haunting the department's loading docks in hopes of tracking down newly arrived computers that they could borrow for their network. A year later, their unique approach to link analysis was earning BackRub a growing reputation among those who had seen it. Buzz about the new search technology began to build as word spread around campus. Matt Cutts, Google's lead engineer in charge of search quality, regularly blogs about SEO and search. Google also has an official blog and has blogs specific to many of their vertical search products.

Yahoo-

Yahoo! was founded in 1994 by David Filo and Jerry Yang as a directory of websites. For many years they outsourced their search service to other providers, considering it secondary to their directory and other content features, but by the end of 2002 they realized the importance and value of search and started aggressively acquiring search companies. Overture purchased AllTheWeb and AltaVista in 2003. Yahoo! purchased Inktomi in December, 2002, and then consumed Overture in July, 2003, and combined the technologies from the various search companies they bought to make a new search engine. Yahoo! dumped Google in favor of their own in house technology on February 17, 2004 . On March 20, 2005 Yahoo! purchased Flickr, a popular photo sharing site. OnDecember 9, 2005, Yahoo! purchased Del.icio.us, a social bookmarking site. Yahoo! has also made a strong push to promote Yahoo! Answers, a popular free community driven question answering service.

Bing-

On June 1, 2009, Microsoft launched Bing, a new search service which changed the search landscape by placing inline search suggestions for related searches directly in the result set. For instance, when you search for credit cards they will suggest related phrases like • credit card types • apply for credit cards • credit cards for bad credit • advice on credit cards Microsoft released a Bing SEO guide for Webmasters [PDF] which claimed that the additional keyword suggestions helped pull down search demand to lower listed results when compared against the old results 6 through 10 when using a single linear search result set. Conversely, the Google format tends to concentrate attention on the top few search listings. After extensive eye tracking Gord Hotchkiss named this pattern Google's Golden Triangle.

AltaVista-

debut online came on January 1993. AltaVista brought many important features to the web scene. They had nearly unlimited bandwidth (for that time), they were the first to allow natural language queries, advanced searching techniques and they allowed users to add or delete their own URL within 24 hours. They even allowed inbound link checking. AltaVista also provided numerous search tips and advanced search features. Due to poor mismanagement, a fear of result manipulation, and portal related clutter AltaVista was largely driven into irrelevancy around the time Inktomi and Google started becoming popular. On February 18, 2003, Overture signed a letter of intent to buy AltaVista for $80 million in stock and $60 million cash. After Yahoo! bought out Overture they rolled some of the AltaVista technology into Yahoo! Search, and occasionally use AltaVista as a testing platform.

Alexa-

Alexa Internet was founded in 1996 by Brewster Kahle and Bruce Gilliat. The company's name was chosen in homage to the Library of Alexandria,drawing a parallel between the largest repository of knowledge in the ancient world and the potential of the Internet to become a similar store of knowledge. The company offered a toolbar that gave Internet users suggestions on where to go next, based on the traffic patterns of its user community. Alexa also offered context for each site visited: to whom it was registered, how many pages it had, how many other sites pointed to it, and how frequently it was updated. In 1999, Alexa was acquired by Amazon.com for about US$250 million in Amazon stock as the company moved away from its original vision of providing an "intelligent" search engine. Alexa began a partnership with Google in early 2002, and with the Open Directory Project in January 2003.In May 2006, Amazon replaced Google with Live Search as a provider of search results. In December 2006, they released Alexa Image Search. Built in-house, it was the first major application to be built on their Web platform.

HTTP Header-

In the Hypertext Transfer Protocol (HTTP), HTTP header fields contain the operating parameters of an HTTP request or response. With the request or response line (first line of message), they form the message header. HTTP Headers are the request to a server for information and the resulting response. When you input an address into your browser it sends a request to the server hosting the domain and the server responds. You can see the request and response using our basicHTTP Header Viewer. The HTTP Header Viewer can be used to view the Headers or Headers and Content of any valid http:// url. When HEAD is selected the request is for the server to only send header information. A GET selection requests both headers and file content just like a browser request. Information in response headers may include