A drn file extension is related to the Darn for DOS program. A drn file contains data.
DRN file extension - Darn for DOS data
What is drn file? How to open drn files?
File type specification:
The drn file extension is associated with the Darn a program for MS-DOS operating system. The .drn file stores various dada used for internal purposes of the Darn.
The Darn is obsolete software as well as MS-DOS operating system.
This drn 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.