Maintainer of the Tcl on Windows FAQ , located at http://www.pconline.com/%7Eerc/tclwin.htm and author of various books, including BOOK Graphical Applications with Tcl and Tk, BOOK Linux Programming, BOOK Cross-Platform Perl, BOOK UNIX Programming Tools, BOOK Linux Configuration and Installation all of which cover some aspect of Tcl, Tk, or Perl/Tk.