Answer:
it’s just a screenie hope it helps
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Note, only Windows really cares about the file extension. OSX's Finder will use it if Finder can't find a creator in the file metadata to select an app when double clicking on it. Linux and Unix don't care.
The integration of the document and records management in the organizations allows the satisfactory organization of the information, reducing the physical file and the costs while increasing the efficiency of all the business processes.