Addin Development Kit for 1-2-3 (1994) 0 DOS

This is a software development kit that assists developers in making add-ins for Lotus 1-2-3 4.x for DOS. Add-ins are binary programs that extend and enhance the functionality of the Lotus 1-2-3 spreadsheet without having to change the Lotus program itself.

• 4

Lotus Improv (1991) 0 Spreadsheet Other

Improv is a spreadsheet program that attempted to re-imagine how one would create and interact with spreadsheets. It was first released in 1991 for NeXT computers, and for a time became one of the NeXT's "Killer Apps". In 1993 Lotus released Improv 2.0 for Microsoft Windows. It was not marketed as a direct replacement to Lotus 1-2-3, and 1-2-3 remained dominant until both were overtaken by Microsoft Excel.

• 1.0