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  2. PC LOAD LETTER - Wikipedia

    en.wikipedia.org/wiki/PC_LOAD_LETTER

    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.

  3. HP Universal Print Driver - Wikipedia

    en.wikipedia.org/wiki/HP_Universal_Print_Driver

    HP Universal Print Driver (UPD) is an intelligent print driver that supports a broad range of HP print devices, such as LaserJet and various MFPs.Developed by Hewlett-Packard, HP UPD combines a general purpose driver (XPSDrv, UniDrv, or PSCRIPT), print control, and HP proprietary extensions.

  4. Troubleshooting - Wikipedia

    en.wikipedia.org/wiki/Troubleshooting

    Troubleshooting is a form of problem solving, often applied to repair failed products or processes on a machine or a system. It is a logical, systematic search for the source of a problem in order to solve it, and make the product or process operational again. Troubleshooting is needed to identify the symptoms.

  5. 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. PJL adds job level controls, such as printer language switching, job separation, environment, status readback, device attendance and file system commands.

  6. Ink cartridge - Wikipedia

    en.wikipedia.org/wiki/Ink_cartridge

    All printer suppliers produce their own type of ink cartridges. Cartridges for different printers are often incompatible — either physically or electrically. Some manufacturers incorporate the printer's head into the cartridge (examples include HP, Dell, and Lexmark), while others such as Epson keep the print head a part of the printer itself.

  7. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    The origin server requires the request to be conditional. Intended to prevent the 'lost update' problem, where a client GETs a resource's state, modifies it, and PUTs it back to the server, when meanwhile a third party has modified the state on the server, leading to a conflict. [24] 429 Too Many Requests (RFC 6585)

  8. Machine-check exception - Wikipedia

    en.wikipedia.org/wiki/Machine-check_exception

    Machine checks are a hardware problem, not a software problem. They are often the result of overclocking or overheating. In some cases, the CPU will shut itself off once passing a thermal limit to avoid permanent damage. But they can also be caused by bus errors introduced by other failing components, like memory or I/O devices.

  9. Inkjet printing - Wikipedia

    en.wikipedia.org/wiki/Inkjet_printing

    Inkjet printing is a type of computer printing that recreates a digital image by propelling droplets of ink onto paper and plastic substrates. [1] Inkjet printers were the most commonly used type of printer in 2008, [2] and range from small inexpensive consumer models to expensive professional machines.