The following information is provided as is, and the authors take no responsibility for the correctness.
RENO is the standard emulation for Agfa printers (P400, P3400 etc.).
RENO is a sort of page description language. The functionality is enormous: beside printing text with different scalable fonts, you may draw lines, fill windows with a pattern, use programming statements (if-then-else, repeat-until, set, use and print variables, push and pop operations), download and print your own symbols and transfer data to the printer’s RAM or to a hard disk or floppy disk if attached.