It will run in DOS without Windows. It produces diagrams like the following. Jenner Vincent's program differs from Oleg Kostko's in many ways. Vincent's program scales a tree of any size to fit onto a single screen. In Kostko's program, all trees are in the same typeface and line width.
Big trees take more space than little ones.
There is no way to print out the trees in Vincent's program. The trees below were captures using a screen capture program running in the background of windows. Vincent's program was running in a DOS window. Kostko's program gives a nice neat graphics printout of the tree. Oleg Kostko and Jenner Vincent were students in V61.0024 and wrote these programs as term projects.