Publisher: Prentice Hall, 1989, 468 pages
X Windows Systems: Programming and Applications with Xt presents programming applications for the Xt Intrinsics and the various widget libraries. This approach to the X Window System enables the applications programmer to create easily and more efficiently the mouse-driven, graphical user interfaces.
Each one of the key features is illustrated with working programs, explanations, and pictures of the screen.
The base upon which Motif was built. Only for interested parties (very few).