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Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was ...
The message is encountered when printing on older HP LaserJet printers such as the LaserJet II, III, and 4 series. It means that the printer is trying to print a document that needs "Letter size" (8½ × 11 in.) paper when no such paper is available. [3] Early LaserJet models used a two-character display for all status messages.
D – HP Deskjet Dxxxx printer; D – HP Photosmart Dxxxx Single Function photo printer; F – HP Deskjet Fxxx All-in-One printer; G – HP Scanjet Gxxxx photo/flatbed scanner; K – HP Officejet Pro Kxxx color printer; M – HP Mono LaserJet Mxxxx Multifunction printer; N – HP Scanjet Nxxxx document/professional image scanner; P – HP Mono ...
Originally developed for early inkjet printers in 1984, PCL has been released in varying levels for thermal, matrix, and page printers. HP-GL/2 and PJL are supported by later versions of PCL. [1] PCL is occasionally and incorrectly said to be an abbreviation for Printer Control Language which actually is another term for page description language.
PostScript Printer Description (PPD) files are created by vendors to describe the entire set of features and capabilities available for their PostScript printers. A PPD also contains the PostScript code (commands) used to invoke features for the print job. As such, PPDs function as drivers for all PostScript printers, by providing a unified ...
In Traditional Mode, HP UPD is bound to a print queue and behaves like a normal printer driver with the addition of bi-directional communications for device queries and real time print job status. This mode can be chosen during driver installation, or on the dynamic mode universal printing dialog box.
If no hardware code page(s) are specified, these drivers default either to a dummy code page number 999 [1] [23] [24] or assume the hardware code page to be equal to the primary code page (the first code page listed in COUNTRY.SYS files for a particular country [27] with the country code either specified in the CONFIG.SYS COUNTRY directive or ...
Laser head from HP LaserJet 5L printer. Most HP LaserJet printers employ xerographic laser-marking engines sourced from the Japanese company Canon.Due to a tight turnaround schedule on the first LaserJet, HP elected to use the controller already developed by Canon for the CX engine in the first LaserJet. [6]