In computers, a printer is a device that accepts text and graphic output from a computer and transfers the information to paper, usually to standard size sheets of paper. Printers are sometimes sold with computers, but more frequently are purchased separately.
Printers vary in size, speed, sophistication, and cost.
In general, more expensive printers are used for higher-resolution color printing. Personal computer printers can be distinguished as impact or non-impact printers. Early impact printers worked something like an automatic typewriter, with a key striking an inked impression on paper for each printed character . It's an impact printer that strikes the paper a line at a time. The inkjet sprays ink from an ink cartridge at very close range to the paper as it rolls by.