David E. Krekelberg is a computer-aided design research engineer at Control Data Corporation. He received a B.S.E.E. degree from the University of Minnesota Institute of Technology in 1982. At age 24, Mr. Krekelberg has more than 10 years of programming experience and has held software design positions at Sperry Corporation and Control Data Corporation. Mr. Krekelberg's work on CAD tool design and development has been published in the proceedings of several major technical conferences.