Biographical sketches of authors

Les W. Wyman IBM Systems and Technology Group, 2455 South Road, Poughkeepsie, New York 12601 (lwyman@us.ibm.com). Mr. Wyman joined IBM in 1965, retired in 1993 as a Senior Technical Staff Member, and rejoined IBM in 1999. He has held numerous technical and technical leadership positions in programming systems: control program design, development, and testing of the SSS, MVT, and MVS operating systems for the IBM S/360, S/370, and S/370 XA systems; channel engineering: design and development of the 308X channel subsystem; and systems architecture: the S/370 XA channel-subsystem architecture, S/390 channel-subsystem architecture including the ESCON Multiple Image Facility, the initial S/390 logical partitioning, and VM high-performance virtual machine architectures, the zSeries QDIO and MCSS architectures, and others. Mr. Wyman has achieved the seventh invention plateau and has received a number of technical achievement awards.

Harry M. Yudenfriend IBM Systems and Technology Group, 2455 South Road, Poughkeepsie, New York 12601 (harryy@us.ibm.com). Mr. Yudenfriend is a Distinguished Engineer. He joined IBM in 1980 after receiving his B.S. degree in computer science from the Columbia University School of Engineering and Applied Science. He has worked in the z/OS software and design area for his entire IBM career, involved in many programming projects as a developer, tester, development team leader, and designer. Mr. Yudenfriend has achieved his sixteenth invention plateau and was named an IBM Master Inventor in December 2001.

John S. Trotter IBM Systems and Technology Group, 2455 South Road, Poughkeepsie, New York 12601 (trotterj@us.ibm.com). Mr. Trotter is a Senior Software Engineer. He joined IBM in 1977 after receiving his B.S. degree in electrical engineering from the Polytechnic University. He has worked in both the hardware and software laboratories on many projects as a microcode and software developer, tester, development team leader, and designer. Mr. Trotter has received several awards and patents, including an IBM Outstanding Technical Achievement Award for the development and testing of MIF.

Kenneth J. Oakes IBM Systems and Technology Group, 2455 South Road, Poughkeepsie, New York 12601 (oakes@us.ibm.com). Mr. Oakes is a Senior Technical Staff Member in the eServer I/O Development Group. He joined IBM in 1977 after receiving his B.S. degree in electrical engineering from the University of New Haven. Mr. Oakes has held various technical positions in the eServer I/O design area. He holds numerous patents relating to channel and I/O subsystem design and has achieved the fourth invention plateau. He has received seven other formal awards, including four IBM Outstanding Technical Achievement Awards and three IBM Outstanding Innovation Awards. Mr. Oakes is currently involved in I/O subsystem design for the next-generation eServer.