*.RSP is the extension for RSLogix 5 software, the editing environment for Rockwell Automation PLC-5 controllers.
If you need to edit and monitor this program, you need a license for RSLogix 5. This software is sold only through Rockwell Automation (Allen-Bradley) distributors.
If you just need to have a printout, post the file here and a Forum member can open it and print it to PDF format.