     These files are for CP/M, and they will not run on a PC clone 
unless you are runninc a CP/M emulator.
     Various of the files are in .LBR files, which is the earliest 
really useful archiving format.  A copy of LUE is included, an MS- 
DOS program which will extract files from .LBR files.  A copy of 
ARCE is included to extract from .ARK files (which are in a format 
not used any more in MS-DOS for archives, so ARCE will complain, 
but it extracts the files all the same).  Some of the files have 
an extension with a "Z" in the center; these are compressed with a 
version of LZW compression, and they are uncompressed (UNDER CP/M) 
with UNCR.COM.  Some of the others have a "Y" in the center of the 
extension; these are uncompressed (UNDER CP/M) with EZL.COM.  