Files with spm file extension are related to the Nanoeducator data format.
SPM file extension - Nanoeducator data
What is spm file? How to open spm files?
File type specification:
The spm file extension is associated with the Nanoeducator, a platform used to teaching scientific laboratories about nanotechnology, developed by NT-MDT.
The spm file contains some kind of data used by Nanoeducator.