An msu file extension is related to the Blaise, a survey processing and interviewing system.
There is one other file type using
the MSU file extension!
.msu - Microsoft Update Standalone Package [common]
MSU file extension - Blaise data
What is msu file? How to open msu files?
File type specification:
The msu file extension is associated with Blaise, a computer-assisted survey processing and interviewing system, created by Statistics Netherlands. The MSU file stores some kind of data used by Blaise.
The Blaise software seems no longer developed and supported.
This msu 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.