FERRET v5.51
Tru64 V4.0E - 02/28/03
FERRET v5.50
Tru64 V4.0E - 01/15/03
FERRET v5.41
Tru64 V4.0E - 08/30/02
          FERRET v5.40  
        Tru64 V4.0E - 02/19/02
          Program FERRET  
        Version 5.22 - 07/27/00
          Program FERRET (V500beta1.1)
        Version 5.00 - 05/26/99