A photocopier is an electronic machine that makes copies of images and documents.
Photocopiers were once single-function devices. Now, enterprise-grade photocopiers are usually networked and perform multiple functions. They are available in desktop or free-standing models. For home and small business use, photocopying is often bundled with scanning, printing and faxing capabilities in a multifunction peripheral (MFP) device.
See a simple video demonstration of how photocopying works: