This work sets out to describe a fully automated Boolean System and to discuss theoretical problems in automatic retrieval of textual information. It details algorithms in each process in the system, including those deemed new in the process and those that are adaptable to the individual. Features include: a review of the principles of constructing a system, such as an information retrieval system; an analysis of basic concepts such as information need, information, information crisis and the notation of information retrieval; construction of an information retrieval system (methods, algorithms and approaches); and different approaches to evaluating the results of information retrieval).