.12M File Extension

Lotus 1-2-3 SmartMaster File

Developer IBM
2.7  |  7 Votes

What is a 12M file?

A 12M file is a spreadsheet created by Lotus 1-2-3, which is part of IBM Lotus SmartSuite. It contains a pre-designed spreadsheet that allows a user to enter information to create forecasts, financial statements, and budgets. 12M files also include formulas, formatting, and print ranges.

More Information

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.

Open over 400 file formats with File Viewer Plus.Free Download

Programs that open 12M files

IBM Lotus 1-2-3  —  Discontinued

Verified by FileInfo.com

The FileInfo.com team has independently researched the Lotus 1-2-3 SmartMaster file format and Windows apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

If you would like to suggest any additions or updates to this page, please let us know.