Tilak Agerwala IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598 (tilak@us.ibm.com). Dr. Agerwala is vice president, systems, at IBM Research. His primary area of research is high-performance computing systems. Dr. Agerwala is responsible for all IBM advanced systems research programs in servers and supercomputers. He received his Ph.D. degree in electrical engineering from The Johns Hopkins University. Dr. Agerwala is a Fellow of the Institute of Electrical and Electronics Engineers and a member of the Association for Computing Machinery.

Manish Gupta IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598 (mgupta@us.ibm.com). Dr. Gupta is a Research Staff Member and Senior Manager of the Emerging System Software Department at the IBM Thomas J. Watson Research Center. His group has developed system software for the Blue Gene/L machine and conducts research on software issues for high-performance server systems. Since 1992, when he received a Ph.D. degree in computer science from the University of Illinois at Urbana–Champaign, he has worked in the IBM Research Division. Dr. Gupta has coauthored several papers in the areas of high-performance compilers, parallel computing, and high-performance Java Virtual Machines.