This directory contains historic versions of this game. The c-version directory contains a buildable, runnable version from just before the game was translated to Python by ESR in 2006; it's ESR's translation of the UT FORTRAN version. The mayfield.basic file is Mayfield's 1972 version for HP basic, the first rewrite of his original 1971 game and probably the oldest version still in existence. The UT-Trek.basic file is the Grady Hicks version, from 1973. This code, or something much like it, was what the authors of UT Trek wanted to replace.