Type 1

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

Health

 * Diabetes mellitus type 1 (also known as "Type 1 Diabetes"), insulin-dependent diabetes
 * Type I female genital mutilation
 * Type 1 personality
 * Type I hypersensitivity (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, 1890s vis-a-vis
 * Volkswagen Type 1, an automobile commonly known as the Volkswagen Beetle

Military

 * German Type I submarine
 * Type 001 aircraft carrier, PLAN carrier class variant of the Soviet Kuznetsov class
 * Nakajima Ki-43, 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, an armoured personnel carrier
 * Type 1 Ho-Ki, 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, a Japanese fire-and-forget anti-tank missile
 * Type 1 heavy machine gun, 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 used in statistics
 * Type 1 encryption, a cryptographical certification
 * Type 1 fonts
 * 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
 * Type I string theory
 * Type I transmembrane protein
 * Type I, part of the Kardashev scale 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.
 * Type-1 language in the Chomsky hierarchy of formal languages, a.k.a. context-sensitive language