An internationally recognized independent expert, classifier and evaluator of information systems is the Gartner Group. Belonging of the information system (software product) to the Gartner Quadrant is a recognition of the quality, functionality and viability of the system, a guarantee of its system support. The information systems included in the Gartner Quadrant are certainly world-class systems. By the way, among such systems, there are also systems with open source – shareware.