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

Individual Training for Lotus 1-2-3 (1986) 0 Education DOS

Individual Training for Lotus 1-2-3 is an interactive computerized training lesson for Lotus 1-2-3 Release 1A and Release 2. Individual Software also produced a number of other training programs such as Professor DOS.

• 2.x

Lotus 1-2-3 (1983) 108 Spreadsheet DOS

Lotus 1-2-3 was an early spreadsheet application available for MS-DOS. It became extremely popular in the late 1980s, displacing the former leader VisiCalc. Lotus had difficulties adapting 1-2-3 to the Windows environment, and was overtaken by Microsoft Excel. Spreadsheet functionality was also included in Lotus Symphony. Later versions were included in Lotus SmartSuite.

• 1.x (DOS)
• 1A (PCJr Cart)
• 2.x (DOS)
• 3.x (DOS)
• Add-ins
• 4.x (DOS)