From the reviews: "It consists of 21 contributed papers, and a 90-plus-page monograph, 'Lattice Theory for Rough Sets'. ... would primarily be of interest to researchers and graduate students who are, or would like to be, in the area of rough sets." (Shrisha Rao, Computing Reviews, Vol. 50 (1), January, 2009)

• Contributed Papers.- Propositional Logics from Rough Set Theory.- Intuitionistic Rough Sets for Database Applications.- An Experimental Comparison of Three Rough Set Approaches to Missing Attribute Values.- Pawlak’s Landscaping with Rough Sets.- A Comparison of Pawlak’s and Skowron–Stepaniuk’s Approximation of Concepts.- Data Preparation for Data Mining in Medical Data Sets.- A Wistech Paradigm for Intelligent Systems.- The Domain of Acoustics Seen from the Rough Sets Perspective.- Rule Evaluations, Attributes, and Rough Sets: Extension and a Case Study.- The Impact of Rough Set Research in China: In Commemoration of Professor Zdzis?aw Pawlak.- A Four-Valued Logic for Rough Set-Like Approximate Reasoning.- On Representation and Analysis of Crisp and Fuzzy Information Systems.- On Partial Covers, Reducts and Decision Rules with Weights.- A Personal View on AI, Rough Set Theory and Professor Pawlak.- Formal Topology and Information Systems.- On Conjugate Information Systems: A Proposition on How to Learn Concepts in Humane Sciences by Means of Rough Set Theory.- Discovering Association Rules in Incomplete Transactional Databases.- On Combined Classifiers, Rule Induction and Rough Sets.- Approximation Spaces in Multi Relational Knowledge Discovery.- Finding Relevant Attributes in High Dimensional Data: A Distributed Computing Hybrid Data Mining Strategy.- A Model PM for Preprocessing and Data Mining Proper Process.- Monographs.- Lattice Theory for Rough Sets.