For anyone, today, after surfing the Internet for information of value is as if you were looking for a needle in a haystack: The volume of information that is generated by minute, what of it scattered and lack of truthfulness or form check its authenticity has become the tool in that great chaos. University libraries, in this context, trying to resolve it through the implementation of a new form of service, called thematic specialized directories, you can organize existing information on the Internet, low-quality criteria. This paper addresses the design and implementation of this provision in the Library of the Universidad Central "Marta Abreu" of Las Villas, which facilitates the consultation of various information resources available on the Web, thus enhancing of the information services This institution offers as well as the collaborative work between librarians and users.