DEP3 file extension - Data Exchange Protocol connection designs file
What is dep3 file? How to open dep3 files?
File type specification:
File type data not available.
The DEP3 file extension is used for one of the Data Exchange Protocol files. The data exchange protocols (DEP) define logical sets of the complete data at defined stages in the process, from analysis through design and fabrication. A *.dep3 file contains connection design data.
Seems like it was used in the past in some 3D engineering software.