Smalltalk CHG

The Smalltalk Class Hierarchy Graph Browser (abbreviated "CHG," which is pronounced affectionately as "chug") is a graphical class inheritance hierarchy browser that is integrated with the Smalltalk desktop.

CHG was my first Smalltalk program, written as one of my class projects in 1992 at the Oregon Graduate Institute. There was a version of CHG after 0.3, which used the fancier GUI components in a later version of Objectworks, but all known copies were lost. A related Smalltalk tool I worked on a few years later was SmallToons.

You can download file chg-0-3.st, for ParcPlace Objectworks Smalltalk 4.1.