IBM 3270 PC High Level Language Application Program Interface (1985) 1 DOS

The IBM 3270 Personal Computer High Level Language Application Program Interface (abbreviated "HLLAPI") is a software tool which enables users to develop microcomputer applications that transparently establish 3270 emulation sessions when host data is needed.

• 3.x

WordPerfect Office (Groupware) (1990) 1 Utility Editor PIM DOS

WordPerfect Office, from WordPerfect Corp, is a groupware utility that includes a menu shell, text editor, calendar, calculator, notebook, and file manager. It is unrelated to the later Corel office suite by the same name. Earlier versions were known as WordPerfect Library.

• 3.0