Referencing the BORLAND.TXT article:

The serial number for a dBASE IV version 1.5 diskette was:
  WA711C10152190

Since Version 2.0 is the next version, the first 6 digits of
the serial number establishing the product should be:
  WA712C
 
The seventh digit was chosen as 5 to make the sum be 22.

Taking the easy way out, the next 7 digits were taken as 0
which is also a multiple of 11.

I then successfully installed dBASE IV using the serial number:
  WA712C50000000


Good luck,

Edward Teach, Queene Anne's Revenge, 3/26/93
