Mark II

Mark II or Mark 2 often refers to the second version of a product, frequently military hardware. "Mark", meaning "model" or "variant", can be abbreviated "Mk."

Mark II or Mark 2 can specifically refer to:

In technology

In military and weaponry

• Mark II, a variant of the British Mark I tank
• 16"/50 caliber Mark 2 gun, a U.S. Navy gun that was never mounted on any ship
• Supermarine Spitfire Mk II; an upgraded Spitfire variant with a stronger Merlin engine
• Cruiser Mk II, a WWII British tank
• Thin Man nuclear bomb (1945), formally known as Mark 2 nuclear bomb, a gun-type plutonium bomb
• Mk 2 grenade, an American grenade used in WWII, Korean War and the Vietnam War
• Gerber Mark II (1967), an American double-edged combat knife
• Ruger MK II (1982-2005), an American handgun
• Merkava Mark II (1983); battle tank of Israel Defense Forces

In vehicles

• British Rail Mark 2 (1964); a rail carriage design
• Jaguar Mark 2, an automobile produced from 1959 to 1967.
• Lincoln Continental Mark II (1956-1957), an American personal luxury car
• Toyota Mark II, a series of Japanese car models
• Volkswagen Polo Mk2, an automobile produced in the 1980s and 1990s

Other technologies

• 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
• Mark II (radio telescope), a radio telescope in England, constructed in 1964
• Mesa Boogie Mark II: an electric guitar amplifier model with channel footswitching
• Canon EOS-1D Mark II, a digital SLR
• Canon EOS-1Ds Mark II, a digital SLR
• Canon EOS-5D Mark II, a digital SLR

Other uses

• Gundam Mk-II, of Gundam fame, first appearing in Mobile Suit Zeta Gundam
• Mark 2 or Mark II, the second chapter of the Gospel of Mark in the New Testament of the Christian Bible
• Pope Mark II of Alexandria, patriarch of the Catholic church from 799 to 819
• Mk II (1969), the second album by the British blues rock band Steamhammer
• MK II (2007), the third album by Masterplan, a German power metal band
• Emergency Medical Hologram Mark II, in the television series Star Trek: Voyager, an artificially intelligent medical assistance program
• Mark II Kobayashi formation, in the game Go, a special opening pattern named after Koichi Kobayashi
• In music, Mark II is often used to denote the second lineup of a band (e.g. Deep Purple Mk II)