The paper presents a brief account of the evolution of the IFToMM Permanent Commission (PC) for History of MMS in terms of activities and people involved in order to illustrate the evolution of the commission with its peculiarities, problems, results, and the possibility of satisfying the constitution purposes of the commission in terms of keeping memory of the history of the IFToMM and of the thematic areas of the MMS (Mechanism and Machine Science) with evaluations and interpretations of historical-technical nature. The examination of these activities is centred on the developments of the last twenty years referring to an activity of the commission with an increasing impact not only within the IFToMM community. The conference, editorial, and social activities are reported with chronicle outlines, including the interaction among the members of the commission, with particular reference to the HMM Symposium on history of mechanisms and machines started in 2000 and the book series of History of MMS started in 2007.
