csv to prn conversion most likely represents printing of CSV data sheets to .prn files, which are used for printing on certain brands of older printers. Might as well be export to old Lotus 1-2-3 files that were used for similar purpose. In any case, modern spreadsheet tools might no longer be up for this task, meaning you will require their old versions or to just use some old spreadsheet utility that still supports export to PRN format.
Updated: August 28, 2023