PRN file extension - Calcomp Raster graphics file
What is prn file? How to open prn files?
File type specification:
The PRN file extension is used for raster graphic files, used in Calcomp plotters and digitizers. Seems like very old graphic file format, probably no longer used. Calcomp shut down all of its operations in 1999.
A .prn file is a bitmap in black and white, or 4bit CMYK.