Mark I or Mark 1 often refers to the first version of a weapon or military vehicle, and is sometimes used in a similar fashion in civilian product development. In some instances, the

Arabic numeral The ten Arabic numerals (0, 1, 2, 3, 4, 5, 6, 7, 8, and 9) are the most commonly used symbols for writing numbers. The term often also implies a positional notation number with a decimal base, in particular when contrasted with Roman numerals. ...

"1" is substituted for the

Roman numeral Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Numbers are written with combinations of letters from the Latin alphabet, ea ...

"I". "Mark", meaning "model" or "variant", can itself be abbreviated "Mk." It may refer to:

Military and weaponry

Mark I tank British heavy tanks were a series of related armoured fighting vehicles developed by the United Kingdom of Great Britain and Ireland, UK during the First World War. The Mark I was the world's first tank, a tracked, armed, and armoured vehicle, ...

(1916), the first tank to be used in combat *

Mk 1 grenade The Mk 1 grenade (sometimes spelled Mk I) is a fragmentation hand grenade used by American forces during World War I. According to its designers, it was to be the "simplest", yet most "fool-proof", grenade ever made. However, some major problems a ...

, the first American-designed grenade used by American forces in World War I *

Mark I trench knife The Mark I trench knife is an American trench knife designed by officers of the American Expeditionary Force (AEF) for use in World War I. History The Mark I was a development of the earlier U.S. M1917 and the slightly improved M1918 trenc ...

, a combat knife carried by US forces after World War I * Supermarine Spitfire Mk I (1938), Royal Air Force fighter aircraft * Mark I Fire Control Computer, United States Navy fire control computer used in World War II surface ships * Mark I Nuclear Weapon (Little Boy), first nuclear weapon used in combat *The

Mark I NAAK In the United States military, the Mark I NAAK, or MARK I Kit, ("Nerve Agent Antidote Kit") is a dual-chamber autoinjector: Two anti-nerve agent drugs— atropine sulfate and pralidoxime chloride—each in injectable form, constitute the kit. ...

, an auto-injector carried by military personnel for use in case of nerve agent attacks *

Patrol Boat, River Patrol Boat, River, or PBR, is the United States Navy designation for a small rigid- hulled patrol boat used in the Vietnam War from March 1966 until 1975. They were deployed in a force that grew to 250 boats, the most common craft in the Ri ...

("Mark I PBR", 1966), 31-foot version of the US Navy riverine patrol boat * Mk 1 Underwater Defense Gun, 1970s United States Navy dart-shooting underwater firearm

Vehicles

* Mk I Mini (1959-1967); the original Austin Mini and Morris Mini-Minor from British Motor Corporation *

British Railways Mark 1 British Rail Mark 1 is the family designation for the first standardised designs of railway carriages built by British Railways (BR) from 1951 until 1974, now used only for charter services on the main lines or on preserved railways. Followin ...

, the first standardised passenger-rated rolling stock (carriages or cars), introduced on British Railways in the 1950s * UTDC ICTS Mark I, rolling stock used by Vancouver SkyTrain rapid transit * Aptera Mk-1, a prototype 3-wheeled autocycle car replacement

Computers

Harvard Mark I The Harvard Mark I, or IBM Automatic Sequence Controlled Calculator (ASCC), was one of the earliest general-purpose electromechanical computers used in the war effort during the last part of World War II. One of the first programs to run on th ...

(1944), an early automatic digital computer made by IBM *

Colossus Mark I Colossus was a set of computers developed by British codebreakers in the years 1943–1945 to help in the cryptanalysis of the Lorenz cipher. Colossus used thermionic valves (vacuum tubes) to perform Boolean and counting operations. Colossu ...

(1944), a British computer used to crack military codes *

Manchester Mark 1 The Manchester Mark 1 was one of the earliest stored-program computers, developed at the Victoria University of Manchester, England from the Manchester Baby (operational in June 1948). Work began in August 1948, and the first version was operat ...

(1949), an early Autocode computer *

Ferranti Mark 1 The Ferranti Mark 1, also known as the Manchester Electronic Computer in its sales literature, and thus sometimes called the Manchester Ferranti, was produced by British electrical engineering firm Ferranti Ltd. It was the world's first commer ...

(1951), an early computer based on the Manchester Mark 1 *MARK 1 or

Perceptron In machine learning, the perceptron is an algorithm for supervised classification, supervised learning of binary classification, binary classifiers. A binary classifier is a function that can decide whether or not an input, represented by a vect ...

(1959-1960), a neural net computer designed by Frank Rosenblatt at Cornell University

Other technologies

* Mark I (detector), a particle detector at Stanford Linear Accelerator Center from 1973 to 1977 * GE BWR Mark I boiling water reactor, a Generation II nuclear reactor *The

Lovell Telescope The Lovell Telescope ( ) is a radio telescope at Jodrell Bank Observatory, near Goostrey, Cheshire, in the north-west of England. When construction was finished in 1957, the telescope was the largest steerable dish radio telescope in the world a ...

, called the Mark I between 1961 and 1970, then the Mark IA between 1971 and 1987

Other uses

Mark 1 Mark 1 is the first chapter of the Gospel of Mark in the New Testament of the Christian Bible. It recounts the proclamation of John the Baptist, the baptism of Jesus Christ, his temptations and the beginning of his ministry in Galilee. Text ...

or Mark I, the first chapter of the Gospel of Mark in the New Testament of the Christian Bible *

Patriarch Mark I Mark the Evangelist ( Koinē Greek: Μᾶρκος, romanized: ''Mârkos''), also known as John Mark ( Koinē Greek: Ἰωάννης Μᾶρκος, romanized: ''Iōánnēs Mârkos;'' Aramaic'': ܝܘܚܢܢ, romanized: Yōḥannān'') or Saint M ...

, retronym for Mark the Apostle as Patriarch of Alexandria *"Mark I" or "Mark 1", the working title of "

Tomorrow Never Knows "Tomorrow Never Knows" is a song by the English rock band the Beatles, written primarily by John Lennon and credited to Lennon–McCartney. It was released in August 1966 as the final track on their album ''Revolver'', although it was the firs ...

," a song by the Beatles *

Visual inspection Visual inspection is a common method of quality control, data acquisition, and data analysis. Visual Inspection, used in maintenance of facilities, mean inspection of equipment and structures using either or all of raw human senses such as vision, ...

, sometimes called "Mark I Eyeball" in US Military slang since the 1950s * Mesa Boogie Mark I (1969), an electric guitar amplifier *Mark I, first version of

Iron Man's armor Iron Man's armor is a fictional powered exoskeleton appearing in American comic books published by Marvel Comics. It is built and worn by billionaire Tony Stark when he assumes the identity of the superhero Iron Man. The first armor was cre ...

* Mark I line-up of rock band

Deep Purple Deep Purple are an English rock band formed in London in 1968. They are considered to be among the pioneers of heavy metal music, heavy metal and modern hard rock, although their musical style has varied throughout their career. Originally for ...

, the band's original line-up, with Rod Evans, Ritchie Blackmore, Jon Lord, Nick Simper and Ian Paice

Military and weaponry

Vehicles

Computers

Other technologies

Other uses

See also