The HP LaserJet 4P printer is the follow-on to the HP LaserJet IIIP printer. The HP LaserJet 4MP printer is the multi-platform (PostScript) version of the 4P printer. PCL operation and the internal fonts in these two printers are identical to that of the HP LaserJet 4ML printer. The 4P and 4MP printers have a control panel unlike the 4L and 4ML printers. Refer to Table 1-1, PCL Feature Support Matrix, for the commands these printers support and to Chapter 3, “Internal Typefaces/Fonts and Symbol Sets,” for font support information.