Bulletin of International Rough Set Society Volume 3, Number 3 Editor: S. Tsumoto Managing Editor: Y.Y. Yao Electronic Managing Editor: M. Hadjimichael Table of Contents Papers Rough Set Rudiments Zdzislaw Pawlak and Andrzej Skowron ............................ 67 A Methodology for Creating A Data Visualization Application for Performance Monitoring of Chase's CD Financial Data Robert Golan ................................................... 73 Conference Abstracts from J. Peters ............................ 77 Conference Abstracts PAKDD'99 (Apr 26--28, Beijing) ................................. 81 ISMIS'99 (June 8--11, Warsaw) .................................. 85 NAFIPS'99 (June 10--12, New York) .............................. 92 DSI'99 (July 4--7, Athens) ..................................... 95 Editors' Introduction: Rough Sets in Knowledge Discovery 1 ..... 101 Editors' Introduction: Rough Sets in Knowledge Discovery 2 ..... 111 IRSS Calendar ................................................... 123 Instruction to Authors S. Tsumoto ..................................................... 129