Source : Free On-Line Dictionary of Computing

msgGUI
     
         A {graphical user interface} for {GNU Smalltalk}.
        The msgGUI package contains the basics for creating window
        {applications} in the manner available in other graphical
        {Smalltalk} implementations.  Version 1.0 of the library was
        by Mark Bush, ECS, Oxford University, UK.
     
        {(ftp://ftp.comlab.ox.ac.uk/pub/Packages/mst/mstGUI-1.0.tar.Z)}.
     
        (2000-06-14)