Advanced Function Presentation Advanced Function Printing <printer, language> (AFP) A {page description language} from {IBM} introduced in 1984 initially as Advanced Function Printing. AFP was first developed for {mainframes} and then brought to {minicomputers} and {workstations}. It is implemented on the various {platforms} by {Print Services Facility} (PSF) software, which generates the {native} IBM printer language, {IPDS} and, depending on the version, {PostScript} and LaserJet {PCL} as well. IBM calls AFP a "printer architecture" rather than a page description language.