# M2

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

## Entertainment

* M² (album), a 2001 album by jazz musician Marcus Miller
* m² (artist), an ambient project of Mathis Mootz
* M2 (TV channel), a Hungarian TV channel
* M2 (Ukraine), a Ukrainian music television channel
* M2, branding used by some programming on South Korean music television channel Mnet (TV channel)
* M2, the former name for MTV2, an American TV channel
* M2 (game developer), Japanese game developer

## Computing

* M.2, a specification for internally mounted expansion cards
* Apple M2, a central processing unit in the Apple M series
* Socket M2, a CPU socket
* Memory Stick Micro, a removable flash memory card format
* Fast Universal Digital Computer M-2, an early Russian digital computer (1957)
* Opera Mail, formerly known as M2
* Modula-2, a computer programming language
* Macaulay2, a free computer algebra system

## Military
### Vehicles

* M2 (missile), a French submarine-launched ballistic missile
* M2 Bradley, an armored fighting vehicle
* M2 half-track car
* M2 light tank
* M2 medium tank
* HMS Havelock (1915) (M2), a WWI British Royal Navy monitor
* HMS M2, a 1919 submarine
* HSwMS M2, a Swedish Navy mine sweeper
* HSwMS Älvsborg (M02), a Swedish Royal Navy mine layer
* Miles M.2 Hawk, a 1930s British two-seat light monoplane
* M2 high-speed tractor, a military aircraft tug

### Weapons

* M2 Ball, ammunition
* M2 Browning, a heavy machine gun in use since the 1920s
* M2 carbine, a select-fire carbine
* M2 flamethrower
* M2 Hyde, submachine gun
* M2 mine, a World War II land mine
* M2 mortar, a 60 mm infantry mortar
* M2 4.2-inch mortar, a 107mm infantry mortar
* M2 tripod, a weapon mount
* Mauser M2, semi-automatic handgun made by Mauser Jagdwaffen GmbH
* 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
* M2 howitzer, the WW2 designation for the M101 howitzer
* M2/M4 Selectable Lightweight Attack Munition (SLAM), a land mine
* Anti-Aircraft Target Rocket M2, a World War II training rocket

## Transport
### Bus routes

* M2 (New York City bus), a New York City Bus route in Manhattan
* Route M-2 (MTA Maryland), a bus route in Baltimore, Maryland and its suburbs

### Metro lines

* M2 (Copenhagen), a line of the Copenhagen Metro, colored yellow on the map
* M2 (Istanbul Metro), a metro line in Turkey
* M2 (Lausanne), part of the Lausanne Metro in Switzerland
* Paris Métro Line 2, part of the Paris Metro in France
* Bucharest Metro Line M2, part of the Bucharest Metro, Romania
* Line 2 (Budapest Metro), the second line of Budapest Metro, Hungary
* M2 (Warsaw), the second line of Warsaw Metro, Poland
* Line M2 - Milan Subway (Metropolitana di Milano)

### Roads

* List of M2 roads
* M2 (Brisbane), Australia
* M2 (Johannesburg), a Metropolitan Route in Johannesburg, South Africa
* M2 (Pretoria), a Metropolitan Route in Pretoria, South Africa
* M2 (Sydney), Australia
* M2 motorway (Great Britain)
* M-2 (Kosovo)

### Vehicles

* M2 (railcar), a Metro-North Railroad railcar
* BMW M2, a variant of the BMW 2 Series
* Freightliner M2, a cubetruck and chassis variants
* Kubicek M-2 Scout, a Czech ultralight aircraft
* LNER Class M2, a class of British steam locomotives

## Science

* 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, a globular cluster in the constellation Aquarius
* Muscarinic acetylcholine receptor M$_2$, a muscarinic receptor for acetylcholine found mainly in the heart
* M2 or M$_2$, the principal lunar semi-diurnal constituent of tides on Earth
* M2, a form of high speed steel in the tungsten-molybdenum series
* M2 macrophage, a phenotype of macrophage
* M2 (economics), a measure of the money supply

## Other

* M2 (Mazda), a marketing approach by Mazda
* M2 Group, an Australian seller of telecommunications services, power, gas, and insurance products
* M-2 visa, a type of United States visa for the dependents of an individual with an M-1 visa
* Leica M2, a 35 mm rangefinder camera introduced in 1957
* Panasonic M2, a video game console design
* m$^2$ or square metre, a unit of area
* M2, one of the ISO metric screw thread sizes
* M2 World Championship, the second esports Mobile Legends: Bang Bang World Championship held in 2021
* M2, a difficulty grade in mixed climbing
* M2 Competition (team), a New Zealand auto racing team
* M2, a monetary aggregate