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 originates when cells that make insulin (beta cells) are destroyed by the immune system. Insulin is a hormone required for the cells to use blood sugar for ...

(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 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 I is distinct fro ...

(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 tricycle, 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 Léon ...

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

Volkswagen Beetle The Volkswagen Beetle—officially the Volkswagen Type 1, informally in German (meaning "beetle"), in parts of the English-speaking world the Bug, and known by many other nicknames in other languages—is a two-door, rear-engine economy car, ...

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''. Only two Type IAs were built, but the decision to halt production on further boats is believed to be because of po ...

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

Nakajima Ki-43 The Nakajima Ki-43 ''Hayabusa'' (, "Peregrine falcon", "Army Type 1 Fighter" ) is a single-engine land-based tactical fighter used by the Imperial Japanese Army Air Service in World War II. The Allied reporting name was "Oscar", but it was o ...

, officially designated Army Type 1 Fighter

Japanese armoured vehicles of World War II

* Type 1 Chi-He, a tank *

Type 1 Ho-Ni I The was a tank destroyer and self-propelled artillery developed by the Imperial Japanese Army for use during World War II in the Pacific theater. It saw limited combat action, being first deployed at the Battle of Luzon in the Philippines in 19 ...

, 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. Development and history The Type 1 Ho-Ki was produced as a result of a request from the army for a heavy armored artillery tractor, which ...

, an armoured personnel carrier

Weapons

* Type 1 37 mm Anti-Tank Gun, a Japanese weapon * Type 1 47 mm Anti-Tank Gun, 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 The Type 1 machine gun was developed for aerial use for the Imperial Japanese Army and Navy during World War II. It was an adaptation of the German MG 15 machine gun. (Note that the 12.7mm Ho-103 and H-104 machine guns are also known as the "Typ ...

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

Other uses

Type I and type II errors In statistical hypothesis testing, a type I error is the mistaken rejection of an actually true null hypothesis (also known as a "false positive" finding or conclusion; example: "an innocent person is convicted"), while a type II error is the fa ...

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 be ...

s * Type-1 Gumbel distribution, a distribution function * Type I lattice * Type 1 sequence * 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 The interior of a bulk superconductor cannot be penetrated by a weak magnetic field, a phenomenon known as the Meissner effect. When the applied magnetic field becomes too large, superconductivity breaks down. Superconductors can be divided into ...

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 contains ...

*Type I Transmembrane Protein * Type I, part of the

Kardashev scale The Kardashev scale ( Russian: Шкала Кардашева, ''Shkala Kardasheva'') is a method of measuring a civilization's level of technological advancement based on the amount of energy it is able to use. The measure was proposed by S ...

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 the construction of driveways and roads.