dspim004.zip  SPIM for Dos 0.04
pspice6a.zip  Design Center 6.0 - part 1
pspice6b.zip  Design Center 6.0 - part 2
pspice6c.zip  Design Center 6.0 - part 3
simnet.1st    Visual SimNet 1.31 (Petri-Networks) info
simnt131.zip  Visual SimNet 1.31 (Petri-Networks)