file extension RTL - Bitmap image (HP Raster Transfer Language)
File extension RTL description:
HP Raster Transfer Language (HP colour printers). It is a language that is understood by various plotters and printers, and is used to produce plotted or printed output from those devices. HP RTL is similar to Hewlett-Packard’s PCL printer language; many of its commands are the same as those of PCL, though some are different.
