Multifunction device (MFD)
A commercially-available imaging product, which is a physically-integrated device or a combination of functionally-integrated components, that performs two or more of the core functions of copying, printing, scanning or faxing. The copy functionality as addressed in this definition is considered to be distinct from single sheet convenience copying offered by fax machines.
The unit must be capable of being powered from a wall outlet or from a data or network connection. This definition is intended to cover products that are marketed as MFDs or multifunction products (MFPs).
EU Energy Star specifications for Imaging Equipment v1.1 [PDF]:
ENERGY STAR v 1.1 qualified MFDs
* Electrophotography: A marking technology using a light source. Types of electrophotography include Laser, LED and LCD.