An smi file extension is related to the IBM Lotus 1-2-3 program. An smi file stores smart icons.
SMI file extension - IBM Lotus smart icons
What is smi file? How to open smi files?
The same as CC: Mail Smart icon. CC: Mail Smart icon technology was implemented in Lotus.
Most likely some old format without support from developer. No further information could be found.
This smi 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 smi file:
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.
List of recommended software applications associated to the .smi 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 smi file, edit smi file, convert smi file, view smi file, play smi file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with smi file - IBM Lotus smart icons
Click on the software link for more information about Lotus 1-2-3. Lotus 1-2-3 uses smi 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.).