Bran Selic  IBM Rational Software, IBM Canada, 770 Palladium Dr., Kanata, Ontario, Canada, K2V 1C8 (bselicca.ibm.com). Mr. Selic is an IBM Distinguished Engineer at IBM Canada working on the CTO team for IBM's Rational brand. He is also an Adjunct Professor of Computer Science at Carleton University in Ottawa, Canada. He has close to 40 years of experience in designing, implementing, and maintaining large-scale industrial software systems, working mostly with telecommunications, aerospace, robotics, and large financial systems. In the late 1980s, he pioneered the application of MDD methods and tools in the real-time domain and is the primary author of a reference text on this topic. In 1992, he cofounded ObjectTime Limited, a highly successful company that developed software tools for MDD. He is recognized as an expert in modeling language design and MDD and has written many papers and articles on this subject. A frequently invited speaker and lecturer at various technical conferences and symposia, he is currently chair of the OMG team responsible for maintaining the UML modeling language standard. He received a Dipl.Ing degree (1972) and a Mag.Ing. degree (1974) from the University of Belgrade in Belgrade, Yugoslavia. He has been living and working in Canada since 1977.