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In this paper we introduce the original as well as updated DeLone and McLean Model of Information Systems Success. The original model has six interrelated dimensions of success: System Quality, Information Quality, Use, User Satisfaction, Individual Impact, and Organizational Impact. The dimensions of Service Quality and Intention to Use were added into the updated model and the original dimensions of Individual and Organizational Impact were combined into one new dimension, Net Benefits. We also present five examples of applying or testing the model together with concrete success measures of IS. We believe that IS success model provides a good framework for identifying and developing different measures. IS success model might provide a practical way to evaluate, for example, user satisfaction and impacts of that satisfaction on the use of information systems.