is a specific kind of: device.

is a broader term that covers: answering machine | beeper, pager | defibrillator | display, video display | display adapter, display adaptor | dongle | doubler | generator | deaf-aid, hearing aid | logic element | computer mouse, mouse | multiplexer | artificial pacemaker, pacemaker | organiser, organizer, PDA, personal digital assistant, personal organiser, personal organizer | read-out, readout | repeater | digital scanner, image scanner, scanner | system clock | trackball | electron tube, thermionic tube, thermionic vacuum tube, thermionic valve, tube, vacuum tube ... show more.