ACT! (1987) 1 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)

Adobe Acrobat (1993) 36 Publishing Windows Unix MacOS

Adobe Acrobat, first released in 1993, is a tool for creating portable electronic documents. Its documents retain complex formatting when used across differing systems, so that they appear identical when viewed on screen or printed to a printer. Acrobat accomplishes this by encapsulating Adobe's PostSript printer language in to a document file format and offering the ability to embed fonts that are not present on the target system.

• 3.x