The principle of parameter tracking technique in model referenced adaptive control systems first introduced by Donalson and Leondes 1963, stressed that the reference model must be exactly of the same order like the total transfer of the non adaptive portion. This method has been modified by AZAB (Military Technical Academy VAAZ; Brno, 1974) to be generally applic-able for less- order models. This leads to an important practical simplification, that it does not require the knowledge of the exact order of the non adaptive portion. In this paper, the modified parameter tracking (MPT) technique is employed to realize adaptivity for a real nonstationary servo system. The introduced results were obtained by coupling the non adaptive real servo system to the computer EAI-50 (Laboratoire d'automatique, Ecole Superieure d'Electricite, antenne de Rennes, France, 1981) which proved satisfactory adaptive behavior of the realized adaptive system.