The .TPM file is used by the TeX/LaTeX package distribution.
TeX/LaTeX is a good typesetting system, widely used among scientists.
It is available for practically every computer where a C complier exists. In principle it is independent of the operating system.
It is possible that operating systems with restricted file names prohibiting extensions end this file name with _TPM (something similar happens with c header files ended which use _H instead of .h).
The last assertion is just based in analogy if you know a real example of such platforms please upgrade this entry.
Other .TPM file extensions
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