Clif Flynt has 30 years of experience as a computer programmer working with everything from microcode to high-level languages, and has been programming Tcl/Tk since 1994. He developed the TclTutor Computer-Aided Instruction package, which he used at many corporations and universities worldwide, and has conducted Tcl/Tk training seminars. He is a charter member of the Tcl/Tk Consortium.