HP LaserJet 4100 HP PCL/PJL reference (PCL 5 Printer Language) - Technical Ref - Page 357

Factory Default Environment A factory default is a setting programmed into the printer at the factory. The group of all the printer's factory settings is referred to as the factory default environment. The factory default symbol set is selectable from the control panel configuration menu (refer to the printer User's Manual). Font A font is a set of characters that have similar characteristics. A font has an assigned name, typeface, and is further described by its spacing, height, pitch, style, stroke weight, symbol set, and orientation. For example, the name of the font used for this text is Helvetica; its height is 10 point, its style is upright, and its stroke weight is medium. Font Cartridge A removable media containing multiple fonts. When a cartridge is plugged into the printer, the printer has access to the fonts contained in the cartridge. Font Header The font header and character definitions contain all the information needed to format a font for use in the HP LaserJet printers. Every PCL font header begins with a font descriptor, which identifies the basic characteristics common to all characters of a font, such as: font type, baseline position, character cell width and height, character orientation, symbol set, etc. Chapter 11 describes the font header and character definition formats for PCL bitmap fonts, as well as Intellifont and TrueType scalable fonts. Height The height of a font is the measurement of the body of the type in points. A PCL point is 1/72nd inch. The body of the type is slightly greater than the distance from the bottom of a descender (such as the tail of lower-case "p") to the top of an unaccented capital letter. EN Glossary-5