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to the information that we want to get. RBSE made the important step of listing the results based on relevancy to the keywords. This was crucial. Prior to that, the results were in no particular order and finding the right location could require plowing through hundreds of listings. Meanwhile, in February 1993, Excite was launched by Stanford students, called Architext. It introduced concept based searching, a complicated procedure that utilized statistical word relationships, such as synonyms. The progress made by them is that this turned up results that might have been missed by other engines if the exact keyword was not entered.

The earliest search engine with modern idea is WebCrawler, launched in April 20, 1994, developed by Brian Pinkerton of the University of Washington. Michael Mauldin put John Leavitt's Spider program into his searching program, and created a company which is now known as Lycos. It added a further degree of accuracy by indexing the entire text of web pages while the other search engines only indexed the URL and titles, which meant that some pertinent keywords might not be indexed, also greatly improved the relevancy rankings of their results.

However, up to that time, the searchers had to know what they were looking for, which is not always the case. The first Web directory can be browsed was EINet Galaxy, online in January 1994, now known as Tradewave Galaxy. It made good use of categories and subcategories, so that searchers could narrow their search.

In April 1994, Yahoo!, a super directory search engine, was developed by David Filo and Jerry Yang(an American Chinese) from Stanford University, which was started as a way to keep track of their personal interests, Yahoo soon became very popular for the university server.

Since then, the world wide webs have been growing and developing so rapidly that none of the search engine can cover all the market. They began to cooperate, or became specialized.

In 1995, the first meta-engine was MetaCrawler released, now called Go2net.com, developed by Eric Selburg, a student from the University of Washington.

In December 1995, AltaVista went online, though a bit late, it made up for it in scope, big and fast, the first to adopt natural language queries and Boolean search techniques, the first to offer "Tips" for good searching prominently on the site, for unparalleled accuracy and accessibility.

In May 1996 HotBot, initially licensed to Wired Magazine website, was introduced by Paul Gauthier and Eric

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