In military and weaponry

• Mark 8 torpedo (1911); American 21-inch torpedo designed by Bliss-Leavitt.
• 18 inch Mark VIII torpedo; a British 18-inch wet-heater torpedo that began service in 1913
• Tank Mark VIII, also known as the Liberty; an Anglo-American tank of World War I
• BL 8 inch Howitzer Mk 8 (1916); British 8-inch artillery piece used in WWI and early WWII
• 21-inch Mark VIII torpedo; a common British 21-inch burner-cycle torpedo that began service in 1927, saw extensive use in WWII and was used as late as 1982 to sink the ARA General Belgrano
• QF 2-pounder Mark VIII (1930-1940s), also known as the "pom-pom"; a quick-firing British naval anti-aircraft gun
• Japanese naval aerial bomb color code Mark 8; a green-brown-grey color code denoting an anti-shipping skip bomb
• Tank, Cruiser, Mk VIII, Cromwell (A27M) (1943), also known as the Cromwell tank
  Cromwell tank
  Tank, Cruiser, Mk VIII, Cromwell ,The designation as the eighth Cruiser tank design, its name given for ease of reference and its General Staff specification number respectively and the related Centaur tank, were one of the most successful series of cruiser tanks fielded by Britain in the Second...
  
  ; the most numerous British cruiser tank in WWII
  • Cruiser Mk VIII Challenger
    Cruiser Mk VIII Challenger
    The Tank, Cruiser, Challenger was a British tank of World War II. It mounted the 17 Pounder gun on the Cromwell chassis to add heavier anti-tank firepower to the cruiser tank units....
    
    ; a Cromwell tank derivative carrying a heavier gun
• Light Tank Mk VIII
  Light Tank Mk VIII
  The Tank, Light, Mk VIII , also known as the Harry Hopkins, after President Roosevelt's chief diplomatic advisor, was a British light tank produced by Vickers-Armstrong during World War II...
  
   (1943), also known as the Harry Hopkins, a British light tank
• Handley Page Halifax C Mk VIII (1944); unarmed cargo and passenger plane variant on the British bomber design
• Supermarine Spitfire Mk VIII; 1944 British fighter aircraft in overseas service, the third-most numerous Spitfire variant
• Mark 8 nuclear bomb
  Mark 8 nuclear bomb
  The Mark 8 nuclear bomb was a nuclear bomb designed late 1940s and early 1950s, which was in service from 1952 to 1957.- Description :The Mark 8 was a gun type nuclear bomb, which rapidly assembles several critical masses of fissile nuclear material by firing a fissile projectile or "bullet" into a...
  
   (1952-1957); an American nuclear bomb
• Mark 8 Landing Craft Tank, a landing craft operated by the British military from the end of World War II to the 1970s

Other vehicles

• Jaguar Mark VIII
  Jaguar Mark VIII
  The Jaguar Mark VIII is a large four-door sports sedan introduced by the Jaguar company of Coventry at the 1956 London Motor Show.-The body:The car shared its wheelbase with its predecessor, the Jaguar Mark VII, which outwardly it closely resembled. However, the interior fittings were more...
  
   (1956-1958), a British sports sedan
• Lincoln Continental Mark VIII (1993-1998), an American personal luxury car

Other technologies

• Sumlock ANITA Mk VIII calculator (1961); a British desktop calculator with Nixie-type tube display
• Mark-8
  Mark-8
  The Mark-8 is a microcomputer design from 1974, based on the Intel 8008 CPU . The Mark-8 was designed by graduate student Jonathan Titus and announced as a 'loose kit' in the July 1974 issue of Radio-Electronics magazine.- Project kit :The Mark-8 was introduced as a 'build it yourself' project in...
  
   (1974); an early 8-bit minicomputer kit based on the Intel 8008 CPU

Other uses

• Mark 8
  Mark 8
  Mark 8 is the eighth chapter of the Gospel of Mark in the New Testament of the Christian Bible. It contains two miracles of Jesus, Peter's confession that he believes Jesus is the Messiah, and Jesus' first prediction of his own death and resurrection...
  
  or Mark VIII, the eighth chapter of the Gospel of Mark in the New Testament of the Christian Bible