is a specific kind of: equipment.

is a broader term that covers: amplifier | audio system, sound system | cassette player | CD player | C.P.U., central processing unit, central processor, CPU, mainframe, processor | circuitry | detector | equaliser, equalizer | electron lens, lens | mixer | modem | monitor | monitor | auxiliary equipment, off-line equipment | cathode-ray oscilloscope, CRO, oscilloscope, scope | computer peripheral, peripheral, peripheral device | playback | radio-gramophone, radio-phonograph | scrambler | set | tape deck | tape player | phone, telephone, telephone set | television equipment, video equipment | terminal ... show more.

has as a part: circuit, electric circuit, electrical circuit | electrode.