Bulletin of International Rough Set Society
Volume 2, Number 1

Editor:                     S. Tsumoto
Managing Editor:            Y.Y. Yao 
Electronic Managing Editor: M. Hadjimichael


Table of Contents


Papers

Rough Mereological Approach - A survey 
     Lech Polkowski and Andrzej Skowron ..........................   1


Rough Set Software

Grobian -- An Implementation of Rough Information Analysis
     Ivo Duntsch and Gunther Gediga ..............................  15

Rule Induction System LERS 
     Jerzy W. Grzymala-Busse .....................................  18

RSDM System 
     Maria C. Fernandez-Baizan, Ernestina Menasalvas Ruiz,
     Jose M. Pena Sanchez and Borja Pardo Pastrana  ..............  21

Trance: a Tool for Rough Data Analysis, Classification, 
        and Clustering 
     Wojciech Kowalczyk ..........................................  24

The ProbRough System
     Andrzej Lenarcik and Zdzislaw Piasta ........................  26

The Rosetta Software System
     Aleksander Ohrn, Jan Komorowski,
     Andrzej Skowron and Piotr Synak  ............................  28

ROSE - Rough Set Data Explorer
     Bartlomiej Predki, Roman Slowinski, Jerzy Stefanowski, 
     Robert Susmaga and Szymon Wilk  .............................  31

RSL -- The Rough Set Library 
     Jacek Sienkiewicz ...........................................  35

ROSEPEN: Environment for the Synthesis and Analysis 
         of Concurrent Processes based on Rough Set 
         Methods and Petri Nets 
     Zbigniew Suraj ..............................................  37

A Software System for Data Mining and Rough and Fuzzy Sets Based 
Classification: RoughFuzzyLab
     Roman W. Swiniarski .........................................  40

PRIMEROSE
     Shusaku Tsumoto .............................................  42

KDD-R: Rough Sets-Based Data Mining System
     Wojciech Ziarko .............................................  44


IRSS Calendar ....................................................  47


Call For Papers ..................................................  48


Instruction to Authors  
     S. Tsumoto  .................................................  50