Bulletin of International Rough Set Society Volume 2, Number 2-3 Editor: S. Tsumoto Managing Editor: Y.Y. Yao Electronic Managing Editor: M. Hadjimichael Table of Contents Papers Rough objects, rough casting, and approximating: Linguistic roots of rough description James F. Peters and Sheela Ramanna .............................. 53 New Developments in the Rough Set Approach to Multi-Attribute Decision Analysis Salvatore Greco, Benedetto Matarazzo and Roman Slowinski ........ 57 Conference Reports and Abstracts RSCTC98: June 21--27, Warsaw The first International Conference on Rough Sets and Current Trends in Computing Lech Polkowski and Andrzej Skowron .............................. 89 IPMU98: July 6--10, Paris International Conference on Information Processing and Management of Uncertainty (with abstracts) Andrzej Skowron ................................................ 93 EURO XVI: July 12--15, Brussels The 16th European Conference on Operational Research (abstracts) Roman Slowinski ................................................ 99 IRSS Calendar .................................................... 104 Call For Papers .................................................. 105 Instruction to Authors S. Tsumoto ................................................. 109