In computers, Printers are output peripherals that print the data output from a computer onto external media. Printers accept text and colorful graphics from the CPU and transfer them to external media, like Paper, transparencies and modern Printers even print on T-shirts. Printers vary in many aspects. The output speed, clarity of print or resolution, and size of the output. More expensive printers usually output more number of pages per minute and also handle high-resolution printing.

Printers are broadly classified into two types, Impact and Non impact printers. Impact printers have impressions of all the characters and an inked impression is struck on the page giving the output. The most popular of impact printers is the dot-matrix printer. Dot matrix printers are not expensive and the cost per page is less. The most popular Non-impact printer is the Inkjet Printer, in which inkjet sprays ink on the paper as the paper rolls by. Another popular Non-impact printer is the Laser printer, in which a laser beam is reflected from a mirror to attract ink (called toner) to selected paper areas as a sheet rolls over a drum.

The major factors to decide when buying a printer are the Resolution, The number of colors it can print, the cost per page and the speed of the output if the print work is large.

Some major manufacturers of printers are Epson, Canon and Hewlett Packard.