The constant growth of the number of end-users who are deprived of the help of intermediary searchers is a source of substantial problems which have to be solved at the different levels of the communication between the human and the computer system. As far as the information retrieval system is concerned the main problem is to provide a satisfactory output to a typical query put by a typical end-user. In this article we have shown that the problems of the end-users can be efficiently solved when the additional information about user needs and preferences is introduced by means of the socalled “profiles.” The complete description of the information retrieval model, its characteristics, and algorithms for computing the profiles have been presented. Some ways of modification and forming a general model are shown at the end of the article.