DELL Unix (1992) 1 Unix

Dell Unix, first introduced in 1989, was an adaptation of AT&T Unix intended for Dell hardware. Although Dell Unix received much praise, Dell found they could not reasonably support it on non-Dell hardware, as many customers wanted, and in 1993 discontinued it.

• 4.0

MasterModeller (1984) 0 Financial DOS

MasterModeller is a model-designing program. With it, you design financial models that enable you to analyze your figures, produce forecasts, and test the effects of decisions. You can set up as many models as you like, sort them all on disk, and use them whenever you need to.

• 2.x