WHAT IS PRINTER?
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 vary in size, speed, sophistication, and cost. In general, more expensive printers are used for higher-resolution color printing.
Using electrophotography as the basis for laser printers, the Xerox Palo Alto Research Center began development on the first laser printer, called EARS, in 1969 and completed it in 1971. While the inkjet printer was invented in 1976, it took until 1988, the release date of Hewlett-Packard's DeskJet, for it to become available for use in the home. In 1992, Hewlett-Packard released the popular LaserJet 4, which was the first 600-by-600 dots per inch resolution printer.