Robert Metzger has worked for over 28 years as an applications programmer, systems programmer, manager of software training, manager of applications programmers, and manager of systems programmers, for several vendors of software and computer systems. He is currently a Senior Engineer in the High Performance Technical Computing Division of Hewlett-Packard Company. His professional interests include optimizing compilers, software development tools, and designing GUI applications. He has written books on computer science as well as numerous articles for popular magazines and academic journals on optimizing compilers, programming languages, and programming methodologies.