A printer is a device that accepts text and graphic output from a computer and transfers the information to paper, usually to standard-size, 8.5" by 11" sheets of paper. Printers vary in size, speed, sophistication and cost. The printing press allows us to share large amounts of information quickly and in huge numbers. In fact, the printing press is so significant that it has come to be known as one of the most important inventions of our time. It drastically changed the way society evolved.