Computer printer

Common types and characteristics

Printers are commonly grouped by printing technology and intended use. Typical categories include:

• Inkjet: sprays tiny droplets of ink onto paper and is popular for photo-quality colour printing.
• Laser: uses toner and a fusing process to produce fast, sharp text and graphics, often used in offices.
• Thermal: heats specially coated paper for receipts and labels.
• Impact/dot matrix: strikes an inked ribbon against paper and is used where multi-part forms are needed.

Key components and connectivity

Typical parts include the print engine, ink or toner supply, paper feed and control electronics. Resolution is described in dots per inch (DPI) while speed is measured by pages per minute (PPM). Modern printers offer multiple connectivity options such as USB, wired Ethernet, Wi‑Fi and direct mobile printing. Manufacturer support and detailed specifications are often available on the device page — see technical information and common computer resources at computer hardware guides.

History and development

Printing from computers evolved through the late 20th century as technologies improved. Early business environments used impact printers, while laser and inkjet technologies became widespread for desktop and office use. Advances in electronics, print heads and consumables have steadily reduced costs and increased quality.

Uses, examples and practical notes

Printers are used for letters, reports, photographs, labels, posters and receipts. Many devices are multifunctional and can copy, scan and fax; see models and comparisons at multifunction device resources. Direct printing from cameras or memory cards is supported by some models — information on that workflow is available at camera printing guides. Paper types and sizes influence output; suppliers and paper recommendations can be consulted via paper and media resources.

Distinctions and notable facts

When choosing a printer consider print quality, running cost, speed, connectivity and support. Environmental factors include power use, consumables recycling and noise. For specialized needs, industrial and large-format printers use different mechanisms adapted for high volume or wide media.