Christopher R. Conklin IBM Systems and Technology Group, 2455 South Road, Poughkeepsie, New York 12601 (smokeyus.ibm.com). In 1984, Mr. Conklin received a B.S. degree in electrical engineering from Rochester Institute of Technology. That same year, he joined the IBM Communications Product Division as a VLSI Test Engineer. He is currently a Senior Engineer working on the development of LIC for the IBM System z processors and was the focal point for the concurrent book add function for the IBM eServer z990 and the concurrent book replacement function for the System z9. Mr. Conklin has received one IBM Outstanding Innovation Award and four Outstanding Technical Achievement Awards; he has also coauthored one patent and two technical papers.

Carl J. Hollenback IBM Systems and Technology Group, 1701 North Street, Endicott, New York 13760 (chollenbus.ibm.com). Mr. Hollenback is a Senior Software Engineer in the IBM System z support element (SE) and hardware management console (HMC) development group. He received an A.A.S. degree in electrical engineering technology from Pennsylvania State University in 1977, a B.S. degree in industrial engineering/computer science from the State University of New York in 1983, and an M.S. degree in information resource management from Syracuse University in 1993. He is currently the team leader for the development of the configuration management component that supports vital product data for System z, and he leads the support element contributions for the development of concurrent functions such as LICCC capacity on demand, capacity backup feature, on/off capacity on demand, concurrent book add, and enhanced book availability.

Carl Mayer IBM Systems and Technology Group, IBM Deutschland Entwicklung GmbH, Schoenaicherstrasse 220, 71032 Boeblingen, Germany (carlde.ibm.com). In 1999, Mr. Mayer received a Graduate Engineer degree in software engineering from the University of Applied Sciences Esslingen, Germany. In 2000, he joined the IBM Development Laboratory in Boeblingen, Germany. He is currently the team leader for the group working on the hardware object model; he was the focal point for the hot-plug function for the System z9. He specializes in high-availability functions and serviceability. Mr. Mayer has received three IBM Outstanding Technical Achievement Awards and has also coauthored one patent and two technical papers.

Alexandra Winter IBM Systems and Technology Group, IBM Deutschland Entwicklung GmbH, Schoenaicherstrasse 220, 71032 Boeblingen, Germany (winterade.ibm.com). In 1995, Mrs. Winter received an M.S. degree in electrical engineering from the University of Karlsruhe. She worked as a research assistant at the research center for information technology (Forschungszentrum Informatik) in Karlsruhe before joining the IBM development laboratories in Boeblingen in 1997. As part of the processor firmware department, Mrs. Winter has worked on various System z and S/390 projects, including the cryptographic coprocessor, external time reference, capacity on demand, concurrent book add, and enhanced book availability. She has received an IBM Outstanding Technical Achievement Award and was the focal point for the capacity on demand functions of the IBM eServer z990 and the System z9.