Because the PostScript interpreter has been designed to handle very complexpage descriptions, all implementation limits are large enough that most Post-Script page descriptions should never come close to exceeding them. On theother hand, the interpreter is not designed for unlimited general programming.Although the PostScript language makes no formal distinction between page de-scriptions and general programs, a PostScript interpreter residing in a printer isspecifically optimized for its intended use: to produce raster output according toa fully specified graphical description generated by some external applicationprogram. For this reason, programs that are not page descriptions may well en-counter some of the implementation limits.
