Files with rep extension can also be found as special PCB/CAE files in GERBER format used in PCB industry. Contains designed of printed circuit board.
REP file extension - Gerber (PCB) file
What is rep file? How to open rep files?
File type specification:
File extension rep is also known to be used for one of the many Gerber formats.
A Gerber File is a file format used by printed circuit board manufacturing machines to layout electrical connections such as traces, vias, and pads (the component footprints on the PCB). In addition, the file contains information for drilling, and milling the completed circuit board.