Type 1 or Type I or ''variant'', may refer to:

Health

Diabetes mellitus type 1 Type 1 diabetes (T1D), formerly known as juvenile diabetes, is an autoimmune disease that occurs when the body's immune system destroys pancreatic cells (beta cells). In healthy persons, beta cells produce insulin. Insulin is a hormone required ...

(also known as "Type 1 Diabetes"), insulin-dependent diabetes * Type I female genital mutilation * Type 1 personality *

Type I hypersensitivity Type I hypersensitivity (or immediate hypersensitivity), in the Hypersensitivity, Gell and Coombs classification of allergic reactions, is an allergic reaction provoked by re-exposure to a specific type of antigen referred to as an allergen. Type ...

(or immediate hypersensitivity), an allergic reaction

Vehicles

* Type 1 diesel locomotives

Civilian automotive

* US F1 Type 1, 2010 F1 Car * Bugatti Type 1, an automobile *

Peugeot Type 1 The Serpollet Tricycle/Peugeot Type 1 is a small steam three-wheeler, produced by Peugeot in 1886. It is the first Peugeot car ever made. The Serpollet Tricycle was one of the first industrially manufactured motor vehicles; it was designed by L� ...

, 1890s vis-a-vis *Volkswagen Type 1, an automobile commonly known as the

Volkswagen Beetle The Volkswagen Beetle, officially the Volkswagen Type 1, is a small family car produced by the German company Volkswagen from 1938 to 2003. One of the most iconic cars in automotive history, the Beetle is noted for its distinctive shape. Its pr ...

Military

German Type I submarine The Type I U-boat was the first post–World War I attempt to produce an oceangoing submarine for Nazi Germany's ''Kriegsmarine''. The type was based on the TCG Gür (1936), Spanish Type E-1 and Finnish Finnish submarine Vesikko, CV707, which we ...

* Type 001 aircraft carrier, PLAN carrier class variant of the Soviet Kuznetsov class *

Nakajima Ki-43 The Nakajima Ki-43 ''Hayabusa'' (, "Peregrine falcon"), formal Japanese designation is a single-engine land-based tactical Fighter aircraft, fighter used by the Imperial Japanese Army Air Service in World War II. The Allied World War II Allie ...

, officially designated Army Type 1 Fighter

Japanese armoured vehicles of World War II

* Type 1 Chi-He, a tank * Type 1 Ho-Ni I, a tank *

Type 1 Ho-Ha The was a half-track armoured personnel carrier (APC) used in limited numbers by the Imperial Japanese Army (IJA) during World War II. Development and history The Type 1 Ho-Ha was developed in 1941 as a result of a request from the army for a v ...

, an armoured personnel carrier *

Type 1 Ho-Ki The was a tracked armored personnel carrier (APC) developed by the Imperial Japanese Army in World War II. History, development and prototypes The Japanese Army began developing tractors and prime movers in the early 1930s to give the field arti ...

, an armoured personnel carrier

Weapons

Type 1 37 mm Anti-Tank Gun The was an anti-tank gun developed by the Imperial Japanese Army, and used in combat during World War II. The Type 1 number was designated for the year the gun was accepted, 2601 in the Japanese imperial year calendar, or 1941 in the Gregorian c ...

, a Japanese weapon *

Type 1 47 mm Anti-Tank Gun The was an anti-tank gun developed by the Imperial Japanese Army, and used in combat during World War II. The Type 1 47mm anti-tank gun was optimized for truck drawn operation. The Type 1 number was designated for the year the gun was accepted, 2 ...

, a Japanese weapon *

Type 01 LMAT The is a Japanese man-portable fire-and-forget anti-tank missile. Development began in 1993 at Kawasaki Heavy Industries and was accepted into service in 2001. During development, the missile was designated with the codename XATM-5. Later it was ...

, a Japanese fire-and-forget anti-tank missile *

Type 1 heavy machine gun was a heavy machine gun used by the Imperial Japanese Army during the later stages of the Second World War. Though seemingly intended to replace the older Type 92 heavy machine gun, the weapon never underwent the same level of mass production a ...

, a Japanese weapon * Type 1 machine gun, a Japanese weapon * Type I Rifle, Arisaka; a Japanese combat rifle

Other uses

Type I and type II errors Type I error, or a false positive, is the erroneous rejection of a true null hypothesis in statistical hypothesis testing. A type II error, or a false negative, is the erroneous failure in bringing about appropriate rejection of a false null hy ...

used in statistics *

Type 1 encryption The U.S. National Security Agency (NSA) used to rank cryptographic products or algorithms by a certification called product types. Product types were defined in the National Information Assurance Glossary (CNSSI No. 4009, 2010) which used to define ...

, a cryptographical certification *

Type 1 font PostScript fonts are font files encoded in outline font specifications developed by Adobe Systems for professional digital typesetting. This system uses PostScript file format to encode font information. "PostScript fonts" may also separately ...

s *

Type-1 Gumbel distribution In probability theory and statistics, the Gumbel distribution (also known as the type-I generalized extreme value distribution) is used to model the distribution of the maximum (or the minimum) of a number of samples of various distributions. Thi ...

, a distribution function *

Type I lattice In geometry and mathematical group theory, a unimodular lattice is an integral lattice of determinant 1 or −1. For a lattice in ''n''-dimensional Euclidean space, this is equivalent to requiring that the volume of any fundamen ...

Type 1 sequence Type may refer to: Science and technology Computing * Typing, producing text via a keyboard, typewriter, etc. * Data type, collection of values used for computations. * File type * TYPE (DOS command), a command to display contents of a file. * Ty ...

* Type I plug/socket, known formally as AS 3112, an Australian standard for mains power plugs * Type 1 electrical connector, used by electric vehicles *

Type I superconductor Type may refer to: Science and technology Computing * Typing, producing text via a keyboard, typewriter, etc. * Data type, collection of values used for computations. * File type * TYPE (DOS command), a command to display contents of a file. * Ty ...

Type I string theory In theoretical physics, type I string theory is one of five consistent supersymmetric string theories in ten dimensions. It is the only one whose strings are unoriented (both orientations of a string are equivalent) and the only one which perturba ...

Type I transmembrane protein A single-pass membrane protein also known as single-spanning protein or bitopic protein is a transmembrane protein that spans the lipid bilayer only once. These proteins may constitute up to 50% of all transmembrane proteins, depending on the or ...

* Type I, part of the

Kardashev scale The Kardashev scale () is a method of measuring a civilization's level of technology, technological advancement based on the amount of energy it is capable of harnessing and using. The measure was proposed by Soviet astronomer Nikolai Kardashev i ...

of measuring a civilization's technology level * IEC Type I, one of the four "type" classifications of audio cassette formulation *MOT Type 1 Stone, a UK specification for aggregate used as a

sub-base In highway engineering, subbase is the layer of aggregate material laid on the subgrade, on which the base course layer is located. It may be omitted when there will be only foot traffic on the pavement, but it is necessary for surfaces used ...

in the construction of driveways and roads. * Type-1 language in the Chomsky hierarchy of formal languages, a.k.a.

context-sensitive language In formal language theory, a context-sensitive language is a language that can be defined by a context-sensitive grammar (and equivalently by a noncontracting grammar). Context-sensitive is known as type-1 in the Chomsky hierarchy of formal langu ...