What is copy machine?

A copy machine, also known as a photocopier or copier, is a device that makes paper copies of documents and other visual images quickly and cheaply. Most modern copiers use a technology called xerography, a dry process that uses electrostatic charges on a photoreceptor to attract and then transfer toner particles onto paper, creating an image. They are commonly used in offices, schools, libraries, and other environments where document duplication is needed.