M2

M2, M-2, M.2 or M02 may refer to:

Computing

M2 (game developer)
EarthBound (known as Mother 2 in Japan), a role-playing game for the Super Nintendo Entertainment System
Fast Universal Digital Computer M-2, an early Russian digital computer (1957)
Macaulay2, a free computer algebra system
Mafia II
Memory Stick Micro (M2), a removable flash memory card format
Modula-2 (M2), a computer programming language
Opera Mail, an e-mail and news client in the Opera web browser
Panasonic M2, a video game console design
Socket M2, a CPU socket
M.2, a specification for internally mounted expansion cards

M2 (economics), a measure of the money supply
Modigliani Risk-Adjusted Performance, a measure of risk-adjusted investment performance

M2 Ball, ammunition
M2 Bradley, an armored fighting vehicle
M2 Browning, a heavy machine gun in use since the 1920s
M2 carbine, a select-fire carbine
M2 flamethrower
M2 Half track
M2 howitzer, the WW2 designation for the M101 howitzer
M2 Hyde, the highest-rate United States submachine gun
M2 Light Tank
M2 Medium Tank
M2 mine, a World War II land mine
M2 Mortar, a 60 mm infantry mortar
M2 tripod, a weapon mount
M2/M4 Selectable Light-weight Attack Munition (SLAM), a land mine
M2 Aiming Circle, an optical survey device to measure deflection angles and elevation off a predefined azimuth
M2 compass (Brunton compass), used for mortars and field artillery; uses 6400 mils as opposed to 360 degrees
HMS M2, a submarine
Mauser M2 semi-automatic handgun

M2 (New York City bus), a New York City Bus route in Manhattan
M2 (Copenhagen)
M2 (İstanbul Metro), a metro line in Turkey
M2 (Lausanne), part of the Lausanne Metro in Switzerland
M2 (railcar), a Metro-North Railroad railcar
Bucharest Metro Line M2, part of the Bucharest Metro, Romania
Line 2 (Budapest Metro), the second line of Budapest Metro, Hungary
Line M2 - Milan Subway (Metropolitana di Milano)
Route M-2 (MTA Maryland), a bus route in Baltimore, Maryland and its suburbs
SP&S Class M-2, a steam locomotives class on the Spokane, Portland and Seattle Locomotive Roster

M2 protein, an ion channel in the cell membrane of the influenza A virus
ATC code M02 Topical products for joint and muscular pain, a subgroup of the Anatomical Therapeutic Chemical Classification System
British NVC community M2, a mire biological community in the United Kingdom
Messier 2 (M2), a globular cluster in the constellation Aquarius
M2, a form of high speed steel in the tungsten-molybdenum series
muscarinic acetylcholine receptor M2, a muscarinic receptor for acetylcholine found mainly in the heart
M2 or M₂, the principal lunar semi-diurnal constituent of tides on Earth

M2, or Marching Mizzou, the performing marching band of the University of Missouri
Miles M.2 Hawk, a 1930s British two-seat light monoplane
M2, the second of five mechanics modules taken in the GCE A Level Maths and Further Maths syllabus
M2, an acronym used in aviculture for the Moluccan cockatoo
M2, a nightclub in Shanghai, China, ranked as no. 38 in the world by DJ Magazine
M2, one of the ISO metric screw thread sizes
M2 (Mazda), a short-lived marketing approach by Mazda to create and sell exclusive Mazda-based vehicles for sale in Japan