The research initiated by D. Chandler was continued by B.R. Scott (1973), R.P Rumelt (1974), P. Drucker (1977), R.E. Miles and C.C. Snow (1978), H. Mintzberg (1997), J.L. Boschken (1990) and many others. In this respect, B.R. Scott’s (1973) observations were interesting. He presented the following path of organizational structure evolution. The initial model was simple with slight formalization – the so-called one man show. The next stage was a bureaucratic model that was transformed all the way into a decentralized model. The analysis of related literature and own research on changes in organizational structures may help identify the stages of that evolution. Network organizations are an effect of such evolution of organizational structures.