.12M File Extension

Learn about .12M files and view a list of programs that open them.

Lotus 1-2-3 was first developed by Lotus Development Corporation, which was bought by IBM in 1995. The "1-2-3" refers to the program's three main capabilities: 1) spreadsheet functions, 2) creating charts and graphs, and 3) basic database operations.

NOTE: Lotus 1-2-3 was popular in the 1980s and early-90s. However, it was overtaken by Microsoft Excel in the 90s and was officially discontinued in 2013.

Lotus 1-2-3 was first developed by Lotus Development Corporation, which was bought by IBM in 1995. The "1-2-3" refers to the program's three main capabilities: 1) spreadsheet functions, 2) creating charts and graphs, and 3) basic database operations.

NOTE: Lotus 1-2-3 was popular in the 1980s and early-90s. However, it was overtaken by Microsoft Excel in the 90s and was officially discontinued in 2013.

To open a .12m file, you need compatible software that supports this file format.