M3, M-3 or M03 may refer to:

Computing and electronics Apple M3, a central processing unit in the Apple M series Intel m3, a brand of microprocessors M.3 (aka NF1/NGSFF), a specification for internally mounted expansion cards Leica M3, a landmark 35mm rangefinder camera Modula-3 (M3), a programming language M3, a British peak programme meter standard used for measuring the volume of audio broadcasts m3, a macro processor for the AP-3 minicomputer, the predecessor to m4 M3, a surface-mount version of the 1N4003 general-purpose silicon rectifier diode M3 (email client), an unreleased email client for the Vivaldi browser

Entertainment M3, a comic book created by Vicente Alcazar M3 adapter, a Game Boy Advance movie player M3 (Canadian TV channel), a music and entertainment television channel M3 (Hungarian TV channel), a Hungarian television channel M3: Malay Mo Ma-develop, a 2010 Philippine TV series Meizu M3 Music Card, a 2007 Flash-based MP3 player M3 Perfect, M3 Simply and M3 Real, Nintendo DS and 3DS storage devices M3: The Dark Metal, a 2014 Japanese anime television series M3 (magazine), a Swedish technology news website

Military

Weapons 37 mm gun M3, a light American anti-tank gun M3/M3E1 Multi-role Anti-armor Anti-tank Weapon System (MAAWS) (aka: Carl Gustaf 8.4 cm recoilless rifle), an 84 mm man-portable reloadable anti-tank recoilless rifle 90 mm gun M1/M2/M3, an American anti-aircraft and anti-tank gun M3 howitzer, an American light artillery piece Benelli M3, an Italian semi-automatic shotgun M3 20mm cannon, a United States development of the Hispano-Suiza HS.404 M3 trench knife, a World War II American issue knife M3 machine gun, a variant of the M2 Browning M3 submachine gun (AKA: Grease Gun), an American submachine gun M3 tripod, a modern tripod for the M2 Browning machine gun M3, a code name for a United States military mission at Roosevelt Roads Naval Station in Puerto Rico

Vehicles M3 Amphibious Rig, a German self-propelled amphibious bridging vehicle M3 Bradley, an American infantry fighting vehicle M3 Gun Motor Carriage, American tank destroyer M3 half-track, an armored military vehicle M3 Lee, an American medium tank; also known as "M3 Grant" in Commonwealth service Panhard M3 PTT, a French armored personnel carrier (M3), a WWI British Royal Navy monitor M3 Ram, a Canadian cruiser tank M3 scout car, an American armored vehicle M3 Stuart, an American light tank , a Swedish Royal Navy mine layer , a Swedish Navy mine sweeper (1940–1955) , a British Royal Navy minelayer submarine of the post-WWI period

Music Major third (M3), a type of musical interval Major thirds tuning (M3 tuning), a regular tuning with major-third intervals between successive strings Minor third (m3), a type of musical interval M3 (album), a 1999 album by Mushroomhead M3 (band), an American rock band M3 Classic Whitesnake, a band featuring Bernie Marsden, Micky Moody and Neil Murray M3 Records, a record label Korg M3, a workstation synthesizer Music Media-Mix Market, a doujin music convention

Science and medicine m3, the cubic metre, a unit of volume M3, the minimal modular, but non-distributive lattice in mathematical order theory ATC code M03, Muscle relaxants, a subgroup of the Anatomical Therapeutic Chemical Classification System Messier 3 (M3), a globular cluster in the constellation Canes Venatici Muscarinic acetylcholine receptor M3, an acetylcholine receptor The M-3 (My Mood Monitor) Screen, a mental health symptom checklist Moon Mineralogy Mapper

Transport

Air transport ABSA - Aerolinhas Brasileiras IATA airline designator M3, a cargo airline based in Campinas, Brazil Miles M.3 Falcon, a 1930s British four-seat cabin monoplane DJI Matrice 3, a Chinese industrial drone DJI Mavic 3, a Chinese camera drone

Automobiles Bisu M3, a Chinese MPV BMW M3, a German compact performance car series BYD M3, a Chinese MPV Dongfeng Fengxing Lingzhi M3, a Chinese MPV Haima M3, a Chinese subcompact sedan JAC Refine M3, a Chinese MPV XPeng Mona M03, a Chinese battery electric compact sedan

Roads and routes Eastern Freeway (Melbourne), part of the M3 in Victoria, Australia EastLink (Melbourne), part of the M3 in Victoria, Australia Highway M03 (Ukraine), an international highway connecting Kyiv with Dovzhansky M3 highway (Russia), another name for the Ukraine Highway in Russia M-3 (Michigan highway), a state highway in the Detroit metropolitan area M3 motorway (disambiguation), several roads M3 (New York City bus), a New York City Bus route in Manhattan M3 Milton–City Centre, a bus route in Glasgow M3 (East London), a Metropolitan Route in East London, South Africa M3 (Cape Town), a Metropolitan Route in Cape Town, South Africa M3 (Pretoria), a Metropolitan Route in Pretoria, South Africa M3 (Port Elizabeth), a Metropolitan Route in Port Elizabeth, South Africa Route M-3 (MTA Maryland), a former bus route in Baltimore, Maryland Jalan Datuk Wira Poh Ah Tiam, numbered M3 in Malacca, Malaysia M3 road (Zambia), a road in Zambia M3 road (Malawi), a road in Malawi

Rail transport LCDR M3 class, a steam locomotive class of the London, Chatham & Dover Railway M1/M3 (railcar), a Long Island Rail Road and Metro-North Railroad railcar Sri Lanka Railways M3, a diesel-electric locomotive class of Sri Lanka Railways Line M3 (Budapest Metro), the North-South Line of the Budapest Metro, Hungary M3 (Copenhagen Metro) (City Circle Line or Cityringen), a future expansion of the Copenhagen Metro M3 (Istanbul Metro), a rapid transit line in the European part of Istanbul, Turkey Milan Metro Line 3, a subway line serving Milan, Italy

Other uses M3, an ISO metric screw thread size M3 (economics), a measure of the money supply M3 (hieroglyph), the Ancient Egyptian baker's tool hieroglyph MLBB M3 World Championship, the third Mobile Legends: Bang Bang World Championship held in 2021 M3, a difficulty grade in mixed climbing McLaren M3, a racing car

See also

MMM (disambiguation) 3M (disambiguation) M1903 (disambiguation) MThree (Coquitlam), a high-rise condominium in British Columbia List of highways numbered 3