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.12M File Extension

File TypeLotus 1-2-3 SmartMaster File

2.3 (6 Votes)
CategorySpreadsheet Files

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.

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Programs that open 12M files
Updated 3/13/2018

About 12M Files

Our goal is to help you understand what a file with a *.12m suffix is and how to open it.

The Lotus 1-2-3 SmartMaster file type, file format description, and Windows programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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