This is Tk version 8.4, a GUI toolkit for Tcl. It provides the means to write simple scripts to create and manipulate X window system windows with the various manipulators available in X11 libraries. The best way to get started with Tcl and Tk is to read ``Tcl and the Tk Toolkit, 4th ed'' by John K. Ousterhout, Addison-Wesley, ISBN 0-13-038560-3. A full set of manual pages is also provided with this package.