Type III

Type III or Type 3 may refer to:

Japanese weapons

 * Type 3 Chi-Nu, a Japanese medium tank
 * Type 3 mine, a Japanese land mine
 * 8 cm/40 3rd Year Type naval gun, a Japanese weapon
 * Type 3 12 cm AA Gun, a Japanese weapon
 * Type 3 Chū-SAM, a Japanese medium-range surface-to-air missile
 * Type 3 heavy machine gun, a Japanese heavy machine gun of World War I
 * Type 3 aircraft machine gun, a Japanese aircraft machine gun of World War II

Biology and medicine

 * Hyperlipoproteinemia type III, a risk factor for cardiovascular disease
 * Nitric oxide synthase 3, an enzyme
 * Type III intermediate filaments, structural proteins
 * Type III secretion system used by pathogenic bacteria

Mathematics

 * Type III von Neumann algebra
 * Type III sums of squares, a measurement of the explanatory power of a variable after accounting for all other variables in the model in statistics
 * Type III error, any of several proposed extensions to the concept of Type I and type II errors in statistics

Other

 * Type-III Civilization on the Kardashev scale, a way to classify civilizations
 * British Railways Type 3 Diesel locomotives
 * The Volkswagen Type 3
 * Peugeot Type 3
 * The IBM Type-III Library, a distribution mechanism for unsupported IBM mainframe software such as CP/CMS
 * PostScript fonts Type 3, a format of Postscript fonts
 * Motorola Type IIi Hybrid, a trunked radio system
 * IEC 62196 Type 3 connector type (alias Plug Alliance)
 * R-Type III: The Third Lightning, a video game
 * IEC Type III, one of the four "type" classifications of audio cassette formulation
 * Type-3 language in the Chomsky hierarchy of formal languages, a.k.a. regular language