Search engine history
In the first phase of development of the Internet, the user of a privileged minority and the amount of information available is relatively low. Access was mainly focused on the staff of several universities and laboratories are used for access to scientific information. Meanwhile, the problem of finding information online is not as critical as it is today. Directories of the site was one of the first methods to improve access to information on network resources. Links to these resources are involved. Yahoo was the first project in April 1994. When the sites in the Yahoo directory rapidly increased, the developers of Yahoo, the search folder. Of course it was not a search engine in its true form, because the investigation is limited to the means by which the bids are in the inventory. They are not actively looking for resources and the concept of SEO is to achieve. These lists were presented in detail in the past, but now they have a lot of his popularity. The reason is simple – even with many modern resource directory, information on only a small fraction of the Internet. For example, the largest web directory on the DMOZ (or Open Directory Project). It contains information on about five million resources. Compare this with the Google search engine database containing more than eight million documents. The WebCrawler project started in 1994 and was the first fully functional search engine. AltaVista and Lycos search engines started in 1995 and for years Alta Vista was the main actor in this level.
In 1997, Larry Page and Sergey Brin, Google as a research project at Stanford University. Google is the most famous search engine in the world right now. There are currently three main search engines – Google, Yahoo and MSN Search. Each has its own databases and search algorithms. Many other search engines use the results of these three major search engines and SEO experience that can be used for all. For example, the AOL search engine (search.aol.com) the use of the database that Google and Altavista, Lycos, AllTheWeb and use of databases of Yahoo.