Laser printing is an electrostatic digital printing process. It produces high-quality text and graphics by repeatedly passing a laser beam back and forth over a negatively charged cylinder called a "drum" to define a differentially charged image. The drum then selectively collects electrically charged powdered ink (toner), and transfers the image to paper, which is then heated to permanently fuse the text, imagery, or both, to the paper. As with digital photocopiers, laser printers employ a xerographic printing process. Laser printing differs from traditional xerography as implemented in analog photocopiers in that in the latter, the image is formed by reflecting light off an existing document onto the exposed drum.
Dot matrix printing, sometimes called impact matrix printing, is a computer printing process in which ink is applied to a surface using a relatively low-resolution dot matrix for layout. Dot matrix printers are a type of impact printer that prints using a fixed number of pins or wires and typically use a print head that moves back and forth or in an up-and-down motion on the page and prints by impact, striking an ink-soaked cloth ribbon against the paper. They were also known as serial dot matrix printers. Unlike typewriters or line printers that use a similar print mechanism, a dot matrix printer can print arbitrary patterns and not just specific characters.
A page printer is a computer printer which processes and prints a whole page at a time, as opposed to printers which print one line or character at a time such as line printers and dot-matrix printers. Page printers are often all incorrectly termed “laser printers”—although virtually all laser printers are page printers, other page printing technologies also exist.
Inkjet printing is a type of computer printing that recreates a digital image by propelling droplets of ink onto paper and plastic substrates. Inkjet printers were the most commonly used type of printer in 2008, and range from small inexpensive consumer models to expensive professional machines. By 2019, laser printers outsold inkjet printers by nearly a 2:1 ratio, 9.6% vs 5.1% of all computer peripherals.
The LaserWriter is a laser printer with built-in PostScript interpreter sold by Apple, Inc. from 1985 to 1988. It was one of the first laser printers available to the mass market. In combination with WYSIWYG publishing software like PageMaker that operated on top of the graphical user interface of Macintosh computers, the LaserWriter was a key component at the beginning of the desktop publishing revolution.
Toner is a powder mixture used in laser printers and photocopiers to form the text and images on paper, in general through a toner cartridge. Mostly granulated plastic, early mixtures added only carbon powder and iron oxide; now there are mixtures that contain polypropylene, fumed silica, and various minerals for triboelectrification. Toner using plant-derived plastic also exists as an alternative to petroleum plastic. Toner particles are melted by the heat of the fuser, and are thus bonded to the paper.
Deskjet is a brand name for inkjet printers manufactured by Hewlett-Packard. These printers range from small domestic to large industrial models, although the largest models in the range have generally been dubbed DesignJet. The Macintosh-compatible equivalent was branded as the Deskwriter and competed with Apple's StyleWriter, and the all-in-one equivalent is called OfficeJet.
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. Canon supplies both mechanisms and cartridges for most HP laser printers; some larger A3 models use Samsung print engines.
StyleWriter is a line of inkjet serial printers by Apple, targeted mainly towards consumers. They produced print quality that was better than the dot matrix ImageWriters, and were cheaper than the LaserWriters. All but a few models contained Canon print engines, while the last few were re-badged HP Deskjet printers. When Steve Jobs returned to Apple in 1997, he discontinued most of the company's accessory product lines, including the StyleWriter and LaserWriter.
HP Jetdirect is the name of a technology sold by Hewlett-Packard that allows computer printers to be directly attached to a local area network. The "Jetdirect" designation covers a range of models from the external 1 and 3 port parallel print servers known as the 300x and 500x, to the internal EIO print servers for use with HP printers. The Jetdirect series also includes wireless print server models, as well as gigabit Ethernet and IPv6-compliant internal cards.
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. The error message's vagueness was mocked in the 1999 comedy film Office Space.
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.
The HP LaserJet 2400 series was a line of grayscale laser printers sold by Hewlett-Packard. The printer was aimed at small and medium business use. It was the successor to the HP LaserJet 2300 series, and was in turn replaced by the HP LaserJet P3000 series.
The HP LaserJet 5 is a group of monochrome laser printers produced in the mid-1990s as part of the LaserJet series by Hewlett-Packard (HP). It is the successor to the HP LaserJet 4 series of printers. After the LaserJet 5 series, however, HP introduced a new naming convention for its LaserJet line. While the LaserJet 5L and 5P were replaced with the LaserJet 6L and 6P, there was never a LaserJet 6; the successor to the LaserJet 5/5M/5N/5se line was the LaserJet 4000 series, and the successor to the LaserJet 5si/5siMX/5siNX was the LaserJet 8000 series. In addition, the LaserJet 4V/4MV was not succeeded by a LaserJet 5 series printer, as its successor was the LaserJet 5000 series.
The NeXT Laser Printer [NeXT PN N2000] was a 400 DPI PostScript laser printer, sold by NeXT from late 1988 to 1993 for the NeXTstation and NeXTcube workstations and manufactured by Canon Inc. It included an adjustable paper tray, which enabled it to print on several paper sizes including A4, letter-size, and those of legal and envelope varieties. It was very similar to other printers based on the Canon SX engine, such as the Apple LaserWriter II series and HP LaserJet II/III, although those other printers only printed at 300x300 dpi. Some parts are interchangeable with the LaserJet II/III.
The HP LaserJet P3000 series is a series of black and white laser printers printers for small to medium business use. Unveiled in October 2006, they are a direct replacement for the HP LaserJet 2400 series.
The LaserJet 4000 series is Hewlett-Packard's medium-duty monochrome laser printer range and the successor to the LaserJet 5 series.
The Laserjet 2300 series was a line of grayscale laser printers sold by Hewlett-Packard. The printer was aimed at small and medium business use. The printer utilizes DRAM memory technology and uses 32 MB standard memory, which is expandable to 288 MB. It is compatible with Microsoft Windows and Macintosh Operating System.
The HP-67 is a magnetic card-programmable handheld calculator, introduced by Hewlett-Packard in 1976 at an MSRP of $450. A desktop version with built-in thermal printer was sold as the HP-97 at a price of $750. Collectively, they are known as the HP-67/97.
