Clif Flynt has been a professional programmer since 1978. He has used languages ranging from Am2900 microcode to high level languages such as APL, HTML, and Tcl/Tk. Clif has developed applications for many clients including the US Navy, General Mills, and McDonalds, and also for his own amusement.

Clif has taught computer science at Grinnell College and Eastern Michigan University. He's a member of the Washtenaw Community College Computer Science Advisory Committee. He's delivered training sessions in the US, Canada, Europe, and India, and has given talks at conferences in the US and Europe.

Clif is the president and founder of the Tcl Community Association, the organization that runs the annual Tcl/Tk conference in the US and coordinates the Tcl/Tk and Open ACS involvement with Google Summer of Code. Since 1999, Clif has owned his own company: Noumena Corporation. Noumena Corporation provides computer training and software development services, focusing on Tcl/Tk and other open source technologies.

Clif has written Tcl/Tk for Real Programmers, Tcl/Tk: A Developer's Guide; has edited Interactive Web Applications with Tcl/Tk (Academic Press, Schroeder/Doyle), Practical Programming in Tcl/Tk (Prentice Hall, Welch/Jones/Hobbs), Tcl and the Tk Toolkit (Addison Wesley, Ousterhout/Jones), and Tcl/Tk Programmer's Reference (Osborne, Nelson).

Thomas J. Krehbiel is a graduate electrical engineer with a Masters' in solid state semiconductor and device physics. During his career in the semiconductor industry, he did IC circuit design, IC device design, managed a parametric test area, managed a CIM group, and worked in a RET (Reticle Enhancement Technologies) software development group. Along the way, he created a parametric data analysis system, a wafer tracking system, and a RET processing system.

Thomas has many years of experience managing software development and the hardware and system associated with that development. He has programmed for over 30 years, starting with FORTRAN and ending with his current favorite language Tcl/Tk. As computers changed, Tom worked with mainframes (IBM360), minis (DEC), and desktops (HPUX, Solaris, Linux, Windows).

When he was younger, he enjoyed playing baseball, basketball, handball, tennis, hiking the Grand Canyon, and snow skiing.