• Aug 22, 1947
    (b.) - ?


An American computer scientist and object-oriented methodologist, he is best known for his work in creating, with Grady Booch and Ivar Jacobson, the Object Modeling Technique (OMT); a method to develop object-oriented systems and to support object-oriented programming, and the Unified Modeling Language (UML) designed to provide a standard way to visualize the design of a system. Born in Bethlehem, Pennsylvania, he received a B.S. degree in Physics from the Massachusetts Institute of Technology (MIT), an M.S. degree in Astronomy from the California Institute of Technology (Caltech), and received his Ph.D. in Computer Science from MIT under Professor Jack Dennis. During his Ph.D. research under Professor Jack Dennis, he contributed to the development of data flow computer architecture. His thesis described parallel programming language, parallel processor computer and a basis for a network architecture, which orients itself at data flow. He made further contributions to Object Modeling Technique, IDEF4, the Rational Unified Process and Unified Modeling Language. He began his career in the 1960s at Digital Equipment Corporation (DEC) as a lead research scientist. His main research interests are formal description languages, "semantics of computation, tools for programming productivity, and applications using complex algorithms and data structures". He joined the General Electric Research and Development Center in Schenectady, New York in 1968 where he worked on developing technology, teaching, and consulting. He was the Manager of the Software Engineering Program, leading a team of Ph.D. and M.S. scientists performing research in software engineering in the areas of algorithm development, programming languages and program proving. He worked on a variety of projects, including the design of one of the first time-sharing operating systems, early work in interactive graphics, algorithms for computed tomography, use of parallel machines for fast image generation and VLSI chip design. He also led the development of Object-modeling technique (OMT), an object modeling language for software modeling and designing. In addition, he led a five-year programming effort producing production-quality software. In 1994, he joined Rational Software, where he worked with Ivar Jacobson and Grady Booch. They became known as "the Three Amigos" developing Unified Modeling Language (UML). Later they merged their software development methodologies, OMT, OOSE and Booch into the Rational Unified Process (RUP). In 2003 he moved to IBM, after its acquisition of Rational Software and retired in 2006. He has written a number of books about UML and RUP together with Ivar Jacobson and Grady Booch, including: 1975, “A Parallel Asynchronous Computer Architecture For Data Flow Programs”. MIT thesis; 1991, “Object-Oriented Modeling and Design” with others. Prentice Hall, ISBN 0-13-629841-9; 1996, “OMT insights: perspectives on modeling from the Journal of Object-Oriented Programming” - Foreword by James Coplien; 1999, “Unified software development process”; and 2005, “Object-oriented modeling and design with UML”. He has also published journal articles on his work and has spoken and taught at leading object-oriented conferences. He writes a regular column for the Journal of Object-Oriented Programming.
  • Date of Birth:

    Aug 22, 1947
  • Noted For:

    Co-developer of the Object Modeling Technique (OMT) and the Unified Modeling Language (UML)
  • Category of Achievement:

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