The Polish Operational and Systems Research Society, POSRS (in Polish: Polskie Towarzystwo Badań Operacyjnych i Systemowych, PTBOiS) is the Polish scientific, scholarly and professional non-profit society for the advancements of operational and systems research (OR/SR). The Society is the core active body of the Association of Polish Operational Research Societies (ASPORS), the formal member of the International Federation of Operational Research Societies and its subsidiary, the Association of European Operational Research Societies. History The POSRS (PTBOiS) was established in 1986 with the objective of promoting the development of operational and systems research in Poland, in both methodological and applied research aspects. The Society aims at mobilising the Polish community of specialists in the respective fields, within the academia as well as in business and administration. The POSRS/PTBOiS has since its founding gathered top Polish researchers and scholars in its fields of activities, including members of various academies of sciences, fellows of IEEE, EurAI, IFSA, etc., presidents of various international societies, e.g., IFORS, IFSA, RSS, etc., awardees of top OR/SR prizes exemplified by the EURO Gold Medal, IEEE Pioneer Awards, etc. Since the beginning, and for a long period of time, the President of the Society has been Professor Andrzej Straszak. Currently, the President is Professor Janusz Kacprzyk. The Society cooperates very closely with virtually all top Polish research and scholarly institutions, public administration, industry and business, notably with the Systems Research Institute, Polish Academy of Sciences (Instytut Badań Systemowych PAN) and the Institute of Computing Science, Poznań University of Technology. The POSRS constitutes the core society of the Association of Polish Operational Research Societies. Governance The Society is chaired by the President, and the day-to-day operations are carried out by the Board, with two Vice-Presidents, the Secretary General and the Treasurer, the Board now consisting of altogether 11 persons. The main body of the Society is the General Assembly, electing the Board, the President, and the Controlling Commission. The seat of the Society is located at the Systems Research Institute, Polish Academy of Sciences in Warsaw. Membership As of the end of 2016, the Society had some 100 members, mainly from the research and scholarly institutions, with a noticeable part from the public administration, business and industry. Publications For roughly 20 years POSRS (PTBOiS) had been publishing regularly the proceedings of its continuing conference series, altogether several dozen volumes between 1986 and 2008. On the top of this, occasional volumes