Type 4, Type Four or Type IV 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 Chinese designation for the domestic 8mm copy of the Mauser Model 1904
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 Cooper Mark I, aka Cooper Type 4, a sports car
See also 4 (disambiguation) Category 4 (disambiguation) Class 4 (disambiguation) T4 (disambiguation)