Type 4

Type 4 or Type Four may refer to:

Military

 * Type 4 Chi-To, a Japanese tank
 * Type 4 Ke-Nu, a Japanese tank
 * Type 4 Ka-Tsu, a Japanese amphibious landing craft
 * Type 4 Ho-Ro, a Japanese self-propelled gun
 * Type 4 Ha-To, a Japanese self-propelled gun
 * Type 4 75 mm AA gun, a Japanese anti-aircraft gun
 * Rota Gun, anti-tank rocket launchers
 * Type 4 20 cm rocket launcher, a Japanese mortar rocket
 * Type 4 15 cm howitzer, a Japanese howitzer
 * Type 4 rifle, a Japanese experimental rifle

Transportation

 * British Railways Type 4 Diesel locomotives
 * Type Four platform, a front-wheel-drive car platform
 * Volkswagen Type 4, a four-door sedan
 * Peugeot Type 4

Other uses

 * Type 4 encryption, an encryption algorithm
 * Type IV collagen, a class of collagen
 * Type-4 hypersensitivity, a class of Hypersensitivity reactions that involves T-cells
 * IEC Type IV, one of the four "type" classifications of audio cassette formulation