Photocopy (photocopier machine)

A photocopier (or copier) is a machine that makes paper copies of documents and other visual images quickly and cheaply. Most current photocopiers use a technology called xerography, a dry process using heat. (Copiers can also use other output technologies such as ink jet, but xerography is standard for office copying.)

Source: Wikipedia

Xerox

Xerox Corporation is a global document management company which manufactures and sells a range of color and black-and-white printers, multifunction systems, photo copiers, digital production printing presses, and related consulting services and supplies.

Source: Wikipedia

We often say XEROX when in fact we really are referring to PHOTOCOPY.

Thanks to Kelvin Ong for this one!