Function

The purpose of a printer is to make a copy of a file or document on a computer. Printers typically transfer copies to paper, but in some cases may utilize film or thicker paper like cardstock.

Types

Impact printers use tiny pins or something similar to press against the surface of the paper or other material to create an image. Non-impact printers use lasers or liquid or wax-based inks to color the surface of the paper.

Features

Non-impact printers give users the option of printing in black or white or in color. Printers also feature different print qualities, such as drafts or final copies, and can print documents vertically or horizontally.

Use

When you instruct your computer to print a file, your printer communicates with your printer either through a cable known as a USB connection or wirelessly through an Internet connection. Typically, paper or other material is fed from a tray, passed through the printing mechanism where it is struck or colored, then fed onto a second tray when completed.

Considerations

Some printers are known as multi-purpose printers and allow users to scan documents, make copies or send faxes. These types of printers are generally more expensive than traditional printers.

Source:

Britannica.com: Computer Printer