This course is intended for those with advanced programming skills who want to do serious development of graphical user interfaces. This course includes: an introduction to task analysis and functional design of the user interface; basic principles of computer graphics used in UI implementation; event handling and event dispatching models; screen update algorithms and multi-view architectures; input syntax formalisms and their transformation into programs; interactive geometry; architectures for advanced features such as cut/copy/paste, macros and groupware. The student and the Program Director will jointly determine the choice of 05-630 or 05-631, based upon the student's previous programming experience.