Other Technologies
- Mark II (radio telescope), a radio telescope in England, constructed in 1964
- Harvard Mark II (1947), a computer built at Harvard University and used by the US Navy
- RCA Mark II Sound Synthesizer (1957), a musical instrument made of electronic components
- Canon EOS-1D Mark II, a digital SLR camera
- Canon EOS-1Ds Mark II, a digital SLR camera
- Canon EOS-5D Mark II, a digital SLR camera
- Mesa Boogie Mark II, a Mesa Boogie Mark Series electric guitar amplifier model
- Technics SL-1200/SL-1210 MK2, a direct driven Turntable, standard Turntable for DJ's
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