A photocopier is a machine that makes copies of documents and images quickly and efficiently. It works by using light to scan the original document, which is then reproduced onto paper. Photocopiers can handle various paper sizes and types, making them useful in offices, schools, and homes. Modern photocopiers often come with additional features, such as scanning, printing, and faxing capabilities. They can be connected to computers and networks, allowing users to send documents directly to the machine. This versatility makes photocopiers essential tools for managing paperwork in many environments, including businesses and educational institutions.