PART01.       libdes - DES encryption library, Part01/04 
PART02.       libdes - DES encryption library, Part02/04 
PART03.       libdes - DES encryption library, Part03/04 
PART04.       libdes - DES encryption library, Part04/04 
PATCH01.      libdes - DES encryption library, Patch01 
PATCH02.      libdes - DES encryption library, Patch02