Generally speaking, the printer's manufacturing date and trademark are on the back of the printer body. Individual ones will be at the bottom.

A printer is actually one of the output devices of a computer, printing the results of computer processing on paper. Comparing the quality of a printer mainly depends on these three points: printing resolution, printing speed and noise.

There are many types of printers. Depending on whether the printing element strikes the paper, they are divided into impact printers and non-impact printers. According to the structure of printed characters, they are divided into full-width character printers and dot matrix character printers. Depending on the way a line of words is formed on paper, they are divided into serial printers and line printers.

According to the technology used, it can be divided into cylindrical, spherical, inkjet, thermal, laser, electrostatic, magnetic, light-emitting diode and other printers.