This is a correction to a previous submission that didn't work (my test 
version was the one that got on the tape and it was a test that failed).

This is a DES encryption program that will work on VMS, UNIX, or DOS.
The output is in HEX character format so the files can be mailed (normal
DES output is binary).  Note that messages cannot be decrypted by machines
of differing types due to the different floating point types and byte orders.
It works great between like machines, but it doesn't work at all between
differing machines (VAX to PC, VAX to SUN, SUN to PC, etc.)