Igort Tartalja is currently with the Department of Computer Engineering, Schools of Electrical Engineering, University of Belgrade. He received the BSEE in 1984 and MSEE in 1989, both from the School of Electrical Engineering, University of Belgrade, Belgrade, Serbia, Yugoslavia. He is in the final phase of finishing his PhD thesis on dynamic software maintenance of cache coherence in shared-memory multiprocessors. From 1984 to 1989 he was with the Laboratory for Computer Engineering, Institute for Nuclear Sciences, Vinca, Serbia, Yugoslavia, working primarily on the development of a real-time computer for applications in biophysics and distributed operating system for a special-purpose multicomputer. His current research interests include multiprocessor and multicomputer architectures, heterogeneous processing, and system software support for shared-memory multiprocessors and distributed systems. Veljko Milutinovic has been the Department of Computer Engineering, Schools of Electrical Engineering, University of Belgrade, Belgrade, Serbia Yugoslavia since 1990. From 1982 to 1990 he was on the faculty of the School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana. He has been active in the RISC field for the last decade and in technology-related research (32-bit GaAS RISC for RCA) and application-related research (multimedia-oriented RISC-based multiprocessors efforts of NCR). He has published 40 papers in IEEE journals and presented over 200 invited talks all over the world. He is a senior member of the IEEE.