This file contains the program listings and executables associated with the book - Controlling the World with Your PC.  Here is an excerpt from the readme on the disk:

All program listings in the book are also provided on this disk.  A separate subdirectory is provided for Basic in BAS, Pascal in PAS, and C++ in C.

In addition, another subdirectory, EXE, provides ready to run executable listings.  Programs should run on any IBM / compatible machine equipped with a parallel printer port.