ACT! (1987) 2 PIM DOS

ACT!, or "Activity Control Technology", originally from Conductor Software, and later Contact Software and then Symantec, is an easy to use business relationship management system targeted at traveling sales professionals. It can track things like billable time and expenses.

• 1.10 (DOS)

Oracle Server (1991) 4 Server Database DOS

Oracle Server is an enterprise grade relational database used in many corporations. It was mainly targeted at high end server operating systems, such as IBM AIX, Sun Solaris, HP UX, Digital VMS, Linux, and Microsoft Windows NT. Oracle makes current versions of their software avaialble for download, but older versions usually disappear.

• 6