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  2. PC LOAD LETTER - Wikipedia

    en.wikipedia.org/wiki/PC_LOAD_LETTER

    PC LOAD LETTER. PC LOAD LETTER error on an HP LaserJet 4. PC LOAD LETTER is a printer error message that has entered popular culture as a technology meme referring to a confusing or inappropriate error message. The message is instructing the user to refill the paper tray with letter-sized paper.

  3. Machine Identification Code - Wikipedia

    en.wikipedia.org/wiki/Machine_Identification_Code

    A Machine Identification Code ( MIC ), also known as printer steganography, yellow dots, tracking dots or secret dots, is a digital watermark which certain color laser printers and copiers leave on every printed page, allowing identification of the device which was used to print a document and giving clues to the originator. Developed by Xerox and Canon in the mid-1980s, its existence became ...

  4. HP LaserJet - Wikipedia

    en.wikipedia.org/wiki/HP_LaserJet

    LaserJet as a brand name identifies the line of laser printers marketed by the American computer company Hewlett-Packard (HP). The HP LaserJet was the world's first commercially successful laser printer. [1] Canon supplies both mechanisms and cartridges for most HP laser printers; some larger A3 models use Samsung print engines.

  5. Temporary Error 20 - AOL Help

    help.aol.com/articles/temporary-error-20

    Possible fixes. Restart your Web browser. Clear your Web browser's cache. Make sure you're using a supported Web browser and operating system (OS) Sign out of all devices and sign back in to AOL...

  6. Printer Command Language - Wikipedia

    en.wikipedia.org/wiki/Printer_Command_Language

    Printer Command Language, more commonly referred to as PCL, is a page description language (PDL) developed by Hewlett-Packard as a printer protocol and has become a de facto industry standard. 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]

  7. HP LaserJet 4 - Wikipedia

    en.wikipedia.org/wiki/HP_LaserJet_4

    The HP LaserJet 4 (abbreviated sometimes to LJ4 or HP4) is a group of monochrome laser printers produced in the early to mid-1990s as part of the LaserJet series by Hewlett-Packard (HP).

  8. List of Hewlett-Packard products - Wikipedia

    en.wikipedia.org/wiki/List_of_Hewlett-Packard...

    Printer Notes: In HP printers introduced since ca 2006, alpha codes indicate product groupings and optional features, thus for example: [3]

  9. Printer Job Language - Wikipedia

    en.wikipedia.org/wiki/Printer_Job_Language

    Printer Job Language ( PJL) is a method developed by Hewlett-Packard for switching printer languages at the job level, and for status readback between the printer and the host computer.

  10. Hewlett-Packard - Wikipedia

    en.wikipedia.org/wiki/Hewlett-Packard

    Hewlett-Packard. / 37.4136; -122.1451. The Hewlett-Packard Company, commonly shortened to Hewlett-Packard ( / ˈhjuːlɪt ˈpækərd / HYEW-lit PAK-ərd) or HP, was an American multinational information technology company headquartered in Palo Alto, California. HP developed and provided a wide variety of hardware components, as well as software ...

  11. Error message - Wikipedia

    en.wikipedia.org/wiki/Error_message

    An error message is the information displayed when an unforeseen problem occurs, usually on a computer or other device. Modern operating systems with graphical user interfaces, often display error messages using dialog boxes.