This is the directory for PRODIGY Version 4.0. The main distribution file is prodigy-latest.tar.gz, and the manual is the file manual.ps.gz (currently found in /afs/cs.cmu.edu/project/prodigy/version4.0/pub/). NOTE that the manual is also contained in the system distribution tar file. The file tar.dir.listing contains a list of the files in prodigy-latest.tar.gz. A graphical interface is included in the package that is built on top of Tcl/Tk (and currently works only for Allegro common lisp). Installation instructions exist in the file installing.txt. The Alpine distribution is a separate system and should be installed as an alternative to Prodigy 4.0 distribution itself. Alpine is a hierarchical planner based on the Prodigy 4.0 planner. The Graphical User Interface works only under Allegro Common Lisp at this time.