RPC file extension - 3WayPack file
What is rpc file? How to open rpc files?
File type specification:
The RPC file extension is associated with the 3WayPack three-mode software and promoting three-mode data analysis developed by the Three-Mode Company.
3WayPack is obsolete product, but .rpc files created in it are stored in simple text file format and viewable in the text editors.