TMP files (known as temporary files) are used by many different computer programs. As the name suggests, these files are created to hold temporary data, usually to be retrieved at a later date.
Temporary files can contain any kind of data in any kind of format, and can potentially be used by any computer application, so it's not possible to list all the related applications and tools here.
However, if you are trying to find which application created or uses the file, the location of the .tmp file can often provide clues.
As these .tmp files can be created by so many different applications, it's not possible to say if these files are safe to delete; as some programs may require the data again whereas other applications may not.
If you think it may be safe to delete a .tmp file, make sure you create a backup of the file just-in-case.
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