# M1

M1, M01 or M-1 may refer to:

## Arts, entertainment & media

* M-1 (rapper), one half of hip hop duo Dead Prez
* Korg M1, a keyboard synthesizer
* Leica M1, a 1959 35 mm camera model
* Olympus OM-1, a 1972 manually operated 35mm single-lens reflex camera
* M1 (TV channel), news channel of the Hungarian MTVA
* M-1 (Lithuanian radio station)
* M1 (Ukraine), a television channel
* M1 (Russian TV channel)

## Economics and finance

* M1 (money supply measure), in economics, a measure of the money supply
* M1 Finance, an online financial services company

## Military equipment
### Vehicles
#### US Armed Forces

* M1 Abrams, a main battle tank
* M1 armored car
* M1 combat car, an early tank
* M1 light tractor
* M1 medium tractor
* M1 heavy tractor

#### Other

* Bristol M.1, a 1916 British fighter aircraft
* HMS Abercrombie (1915) (M1), a WWI Royal Navy monitor
* HMS M1 (1917) (1919), an early British submarine
* HSwMS M1 [sv], a Swedish Navy mine sweeper
* HSwMS Älvsnabben (M01), a Swedish Royal Navy mine layer

### Weapons
#### US Armed Forces

* 120 mm gun M1, an anti-aircraft gun
* 155 mm gun M1, a field artillery gun
* 20 mm aircraft gun M1 or French Hispano-Suiza HS.404
* 240 mm howitzer M1, WWII
* 37 mm gun M1, anti-aircraft
* 40 mm automatic gun M1 or Swedish Bofors 40 mm Automatic Gun L/60
* 57 mm gun M1, or British Ordnance QF 6-pounder
* 76 mm gun M1, WWII
* 8-inch gun M1, or M115 howitzer
* 90 mm gun M1, dual-purpose gun
* M1 bayonet
* M1 carbine, WWII
* M1 chemical mine, WWII
* M1 flamethrower, WWII
* M1 frangible grenade, WWII
* M1 Garand, WWII rifle
* M1 mortar
* M1 rocket launcher "bazooka", WWII rocket launcher
* M1 Thompson submachine gun
* M1 underwater defense gun, or Underwater Defense Gun Mark 1 Mod 0

#### Other

* 35.5 cm Haubitze M1, a German WWII howitzer
* Benelli M1, a semi-automatic shotgun
* Guncrafter Industries M1 or Model No. 1, a handgun
* M1 (missile), French
* M1 mine

### Helmets

* M1 helmet

## Science and technology

* the Crab Nebula, also known as Messier object M1
* ATC code M01 Anti-inflammatory and antirheumatic products, a subgroup of the Anatomical Therapeutic Chemical Classification System

### Computing

* a codename for Cyrix 6x86 processor
* M1-DA, M1, or VESA Plug and Display connector
* a part number for a 1N400x general-purpose diode
* Apple M1 system on a chip

### Biology

* Primary motor cortex or M1, a symbol of the primary motor cortex in mammals in neurology
* M1 protein, a matrix protein of the influenza virus
* Muscarinic acetylcholine receptor M1, a receptor in the human autonomic nervous system
* British NVC community M1, Sphagnum auriculatum bog pool community
* 20-O-beta-D-glucopyranosyl-20(S)-protopanaxadiol, a ppd-type monoglucoside ginsenoside metabolized by intestinal bacteria
* M1 macrophage, a phenotype of macrophage

### Medicine

* Slang name for methylone

## Roads and railways
### Railways

* Bucharest Metro Line M1, part of the Bucharest Metro, Romania
* Chesapeake and Ohio class M-1, a steam-turbine locomotive
* Line 1 (Budapest Metro), the first line of Budapest Metro, Hungary
* LNER Class M1, a class of British steam locomotives
* M-1 Rail Line, now the QLine, streetcar service in Detroit
* M1 (Copenhagen), part of the city's Metro system, Denmark
* M1 (Istanbul Metro), a light railway system in Istanbul, Turkey
* M1 (Lausanne Métro), part of the Lausanne Metro in Switzerland
* M1 (Paris Métro), the first rolling stock on the Paris Metro in 1900
* M1 (İzmir Metro)
* M1/M3 (railcar), a series of electric multiple unit cars on the Long Island Rail Road and Metro-North Railroad
* Metro M1 (Prague), metro kit M1, which is used on line C of the Prague Metro
* Milan Metro Line 1
* M1 (Warsaw), the first metro line of the Warsaw Metro
* PRR M1, a class of steam locomotive
* M series (Toronto subway), former rolling stock of the Toronto subway
* Metro North West & Bankstown Line, the first metro line of the Sydney Metro

### Roads

* M1 road (Australia), different sections of the A1 highway
** M1 (New South Wales)
** M1 (Queensland)
** M1 (Victoria)
* Metroad 1, a road in Sydney, Australia
* M-1 (Michigan highway), a road in the United States that runs from Detroit northwesterly to Pontiac
* M1 highway (Belarus), a road connecting the border with Poland and the border with Russia
* M1 highway (Russia), a road connecting Moscow and the border with Belarus
* M1 (East London), a Metropolitan Route in East London, South Africa
* M1 (Johannesburg), a Metropolitan Route in Johannesburg, South Africa
* M1 (Pretoria), a Metropolitan Route in Pretoria, South Africa
* M1 (Durban), a Metropolitan Route in Durban, South Africa
* M1 (Port Elizabeth), a Metropolitan Route in Port Elizabeth, South Africa
* M1 motorway (Hungary), a road connecting Budapest and Győr
* M1 motorway (Northern Ireland), a road connecting Belfast and Dungannon
* M1 motorway (Pakistan), a 155 km (96 mi) road connecting Peshawar and Rawalpindi
* M1 motorway (Republic of Ireland), a road connecting Dublin to the border with Northern Ireland
* M1 motorway, a road in England connecting London and Leeds
* Highway M01 (Ukraine), a road connecting Kyiv and the border with Belarus
* M1 Road (Zambia)

### Bus

* Route M-1 (MTA Maryland), a bus route in Baltimore, Maryland and its suburbs
* M1 (New York City bus), a New York City Bus route in Manhattan

## Vehicles

* M1 category vehicle, a classification of passenger vehicles under the United Nations Economic Commission for Europe

### Aviation and aerospace

* Hakuto-R Mission 1, private Japanese lunar landing mission
* M-1 (rocket engine), the largest liquid Hydrogen and LOx rocket engine ever designed
* Martin M-1, glider
* Matteson M-1, glider
* Miles M.1 Satyr, a 1930s British single-seat aerobatic biplane
* Verville-Sperry M-1 Messenger - 1922

### Automobiles

* BMW M1, a German mid-engined sports car
* Great Wall Haval M1, a Chinese subcompact crossover
* Minardi M01, an Italian 1999 Formula One racing car
* Riich M1, a Chinese city car

### Motorcycles

* Yamaha YZR-M1, a Japanese motorcycle

## Miscellaneous

* M-1 Global or M-1 Mixfight, a mixed martial arts sports organization
* M-1 visa, a vocational training student visa for the USA
* M1 (Singaporean company), a telecommunications company in Singapore
* M1 World Championship, the first esports world championship for the mobile game Mobile Legends: Bang Bang held in 2019
* M1, a difficulty grade in mixed climbing