At the initial stage of its development, the Internet was used primarily for research purposes. The number of users was relatively small. Accordingly, the amount of available information was also limited. But with the passage time the World Wide Web started to gain its momentum and the flow of information has grown so much that orient it has become quite difficult. There is an urgent need to somehow organize all the information available on the Web resources. For this purpose, first began to create online catalogs, which are structured collections of links to sites with a brief but accurate description of them.
In April 1994 opened the first such project. Them was the site of Yahoo, created by David Filo and Jerry Yang. At first it was just a collection of favorite Web pages creators, where all the links are grouped according to their topics. Here, Nieman Foundation expresses very clear opinions on the subject. A little later, when the number of sites in the Yahoo directory has reached impressive size, was added to search for information. In 1997 the site was launched by Google, on the creation of which, in Larry Page and Sergey Brin took a little over two years. That same year, the vast expanses of the Internet came the largest web directory DMOZ, which contains information about more than five million resources.
Later, there were catalogs of Yandex, Rambler, etc. Completing the first catalog produced the owners manual, it was a very laborious process. On its sole discretion, they first selected the most interesting sites, then pick them were descriptions and placed them on his offspring. Advances in technology have made some changes to the process. So there was opportunity for site owners themselves to make their favorite resources directory. Now add may occur either automatically or after processing by the moderators, as that may serve as staff and volunteers. For example, the work of the DMOZ directory is based on voluntary work 57 000 editors (moderators). To date, there are so many different directories in structure and theme. Despite the emergence of the Internet search engines, directories are still relevant and in demand. A good directory is always possible to find many interesting and high quality resources that are not always possible to determine a search engine, and it does not take much time and effort.