M4

M4, m4, M04, or M-4 may refer to:

In biology and medicine

• ATC code M04 Antigout preparations, a subgroup of the Anatomical Therapeutic Chemical Classification System
• British NVC community M4, a type of mire plant community in the British National Vegetation Classification system
• Muscarinic acetylcholine receptor M4, a human protein.

In electronics and computing

• m4 (computer language), a macro processing language
  • GNU m4, the GNU version of the m4 language
• M4 Solutions, a software suite displaying telecommunications data in a geographic view, developed by Mapcom Systems
• M4, part number for a 1N400x general purpose diode

Firearms and military equipment

Guns and cannons

• Spectre M4, a submachine gun
• Benelli M4 Super 90, a combat shotgun
• M4 cannon, a 37 mm automatic gun
• M4 carbine, a military carbine
• M4 Survival Rifle, a foldable rifle issued to United States military pilots in World War II

Military vehicles

• Myasishchev M-4, a Soviet strategic bomber
• HSwMS Carlskrona (M04), a 1980 Swedish Navy minelayer (modified for ocean patrol in 2009 and redesignated as P04)
• M4 Sherman, the primary tank used by the US in World War II
• M4 Tractor, an artillery tractor used by the US Army from 1943

Other military technologies

• M4 SLBM, a French submarine-launched ballistic missile
• M04 (camouflage), a desert camouflage pattern used by the Finnish Defence Forces
• M4 (German Navy 4-rotor Enigma), a variant of the Enigma cryptography machine
• M4 flame fuel thickening compound, a substance used in fire bombs and incendiary weapons
• M2/M4 Selectable Light-weight Attack Munition (SLAM), a land mine

In transportation

Air transport

• Maule M-4, a 1960 American four-seat cabin monoplane
• Miles M.4 Merlin, a 1930s British five-seat cabin monoplane
• Covington Municipal Airport (Tennessee) (FAA location identifier M04)

Rail

• Line 4 (Budapest Metro), Hungary
• Bucharest Metro Line M4, Romania
• M4 (Istanbul Metro), a subway line on the Asian side of Istanbul, Turkey
• M4 (railcar), a Metro-North Railroad railcar
• M4 (Philadelphia rapid transit), a type of subway car used on the Market–Frankford Line in Philadelphia, Pennsylvania

Road transport

• List of M4 roads
• BMW M4, a compact luxury car produced by German automaker BMW
• M4 (New York City bus), a New York City Bus route in Manhattan
• Mid-engine, four-wheel-drive layout, or M4 layout, an automotive design
• M4 Vacamatic, a 1941 semi-automatic transmission made by Chrysler
• M4 (Washington, D.C. bus), a Washington, D.C. Metrobus route

Other uses in science and technology

• Messier 4 (M4), a globular cluster in the constellation Scorpius
• Leica M4, a 1967 35 mm camera
• M4 ISO metric screw thread
• M4 (tools), A line of 4-volt power tools manufactured by Milwaukee Electric Tool Corporation

Other uses

• M4 (EP), an EP by Faunts
• M4 money supply, the total amount of money in bank accounts and in circulation in the United Kingdom
• El Metro 4, also known as M4, an assassinated Mexican drug lord

See also

• 4M (disambiguation)