12M file extension. How to open and convert files with 12M file suffix

Files with 12m extension could be found as part of old Lotus 1-2-3 suite in a program called SmartMaster.

Detailed description

Software that open 12m file

Add comment

12M file extension - Lotus Smartmaster data

What is 12m file? How to open 12m files?

File type specification:

Various data file type

12m file icon:

The 12m file extension is mainly related to Lotus 1-2-3 SmartMaster program from IBM and used for one of its default file types.

Old program used in 80s and 90s.

This 12m file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

The default software associated to open 12m file:

Lotus 1-2-3
(obsolete software)

Company or developer:
IBM

IBM Lotus 1-2-3 is spreadsheet application very popular in 80s and 90s of 20th century. It was released for Microsoft Windows, MS-DOS, Mac OS and OS/2. In 2002 IBM stopped the developing of the IBM Lotus 1-2-3. In the latest versions is Lotus 1-2-3 fully compatible with Microsoft Excel.

Help how to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .12m file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

List of recommended software applications associated to the .12m file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open 12m file, edit 12m file, convert 12m file, view 12m file, play 12m file etc. (if exist software for corresponding action in File-Extensions.org's database).

Unspecified and all other actions for computer programs working with 12m file - Lotus Smartmaster data

Click on the software link for more information about Lotus 1-2-3. Lotus 1-2-3 uses 12m file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).

Microsoft Windows:

Lotus 1-2-3 (obsolete/discontinued)

Similar file types:

Popular topics:

Previous file extension
12A file extension

File-Extensions.org > Various data file types

Next file extension
file extension 12O

Note: We try to keep all external and related links up-to-date, however we are not responsible for the content of any site linked, further links on sites linked, or any changes or updates to the the information found on these sites. File-Extensions.org provides links to third party sites only as a convenience and the inclusion of such links on our site does not imply File-Extensions.org's endorsement of either the site, the organization operating such site, or any products or services of that organization. A visit to any site or page from our web site via these links is done entirely at your own risk.

Legal notice: You may not, under any circumstances, resell or reproduce any information for commercial use without the express prior written consent of File-Extensions.org. Scripts to automatically harvest results are strictly prohibited due to performance reasons and will result in your IP being banned from this website.

Enter any file extension without dot (e.g. pdf)
Search for file extension details and associated application(s)

12M file extension