Identifies a class of devices characterized by their manufacturer, model name/number, software version, etc. This class differs from the Device Instance class in that this class represents all instances of a kind of device whereas the Device Instance class represents one individual. For example, the Device class might describe a Color LaserJet Model CMJ1312 made by Hewlett Packard. The DeviceInstance class might describe the individual Color LaserJet Model CMJ1312 that has serial number 1234. "A contrivance or an invention serving a particular purpose, especially a machine used to perform one or more relatively simple tasks." (The American Heritage Stedman's Medical Dictionary). "A ManufacturedMaterial used in an activity without being substantially changed through that activity." - HL7 V3