Copying refers to copying, which is a general term for all kinds of copying and printing of the original.
Printer is one of the output devices of computer, which is used to print the computer processing results on related media.
There are three indicators to measure the quality of a printer: printing resolution, printing speed and noise.
There are the following types of printers:
1, press the printing element to see if there is any impact action on the paper, which can be divided into impact printers and non-impact printers.
2. According to the structure of printed characters, it can be divided into full-frame printers and dot matrix printers.
3. According to the way a line of words is formed on paper, there are serial printers and line printers.
4. According to the technology adopted, printers can be divided into cylindrical, spherical, inkjet, thermal, laser, electrostatic, magnetic and LED printers.