M55 or M-55 may refer to:

Military

M55 (rocket) The M55 rocket was a chemical weapon developed by the United States in the 1950s. The United States Army produced both Sarin and VX unitary warheads for the M55. History In 1951 the US Army Chemical Corps and United States Army Ordnance Corps, Ord ...

, a nerve agent-filled American Cold War-era rocket *

Myasishchev M-55 The Myasishchev M-55 ( NATO reporting name: ''Mystic-B'') is a high-altitude reconnaissance aircraft developed by OKB Myasishchev in the Soviet Union, similar in mission to the Lockheed ER-2, but with a twin boom fuselage and tail surface desi ...

, a Soviet reconnaissance aircraft *

M55 self propelled howitzer {{Infobox weapon , name= M55 , image= M55 8 inch Self-Propelled Howitzer 3.JPG , image_size = 300 , caption= M55 howitzer in the US Army Ordnance Museum , origin= United States , type= Self-propelled artillery , is_vehicle= yes , is_UK= yes , s ...

, an American self-propelled artillery piece *

M55 machine gun trailer mount The M45 Quadmount (nicknamed the "meat chopper" and "Krautmower"Rottman, Gordon L., Browning .50-Caliber Machine Guns', Osprey Publishing (2010), , p. 19-20 for its high rate of fire) was a weapon mounting consisting of four of the "HB", or "hea ...

, an American quadruple .50 caliber machine gun system based on the M45 Quadmount *

Zastava M55 The Zastava M55, also designated 20/3-mm-M55, is a Yugoslavian/Serbian 20mm triple-barreled automatic anti-aircraft gun developed in 1955 and produced by Crvena Zastava (now Zastava Arms company) in Kragujevac, Serbia, for Yugoslav People's Arm ...

, a Yugoslav/Serbian anti-aircraft gun *

Tikka M55 The Tikka M55 (originally Tikka M76 and also Tikka LSA55) is a Finnish rifle designed by Finnish firearms company Tikkakoski in 1967–1968. M55 was the first centerfire rifle action designed by Tikkakoski, and it was manufactured from 1968 to ...

, a Finnish rifle * M55, a folding stock version of the

M50 Reising submachine gun The .45 Reising submachine gun was manufactured by Harrington & Richardson (H&R) Arms Company in Worcester, Massachusetts, USA, and was designed and patented by Eugene Reising in 1940. The three versions of the weapon were the Model 50, the fo ...

* M-55S, a Slovenian tank, a modernization of the

T-55 The T-54 and T-55 tanks are a series of Soviet main battle tanks introduced in the years following the Second World War. The first T-54 prototype was completed at Nizhny Tagil by the end of 1945.Steven Zaloga, T-54 and T-55 Main Battle T ...

* M55 helmet, a Finnish variant of the

Stahlhelm The ''Stahlhelm'' () is a German military steel combat helmet intended to provide protection against shrapnel and fragments of grenades. The term ''Stahlhelm'' refers both to a generic steel helmet and more specifically to the distinctive Germa ...

Science and technology

Messier 55 Messier 55 (also known as M55 or NGC 6809) is a globular cluster in the south of the constellation Sagittarius. It was discovered by Nicolas Louis de Lacaille in 1752 while observing from what today is South Africa. Starting in 1754, Charles M ...

(M55), a globular cluster in the constellation Sagittarius * M55, a

Samsung Sens Samsung Sens (branded as Samsung Electronics Notebook System, and stylized as ''SENS'') is the notebook computer series made by Samsung Electronics. Samsung notebooks are designed similarly to the Acer Aspire, Asus Transformer and Zenbook, Dell ...

laptop computer model * Siemens M55, a mobile phone * Cortex-M55, an

ARM Cortex-M The ARM Cortex-M is a group of 32-bit RISC ARM processor cores licensed by Arm Holdings. These cores are optimized for low-cost and energy-efficient integrated circuits, which have been embedded in tens of billions of consumer devices. Thou ...

processor core * ThinkCentre M55, a ThinkCentre M series PC

Transportation

M55 (New York City bus) The M5 and M55 bus routes constitute a public transit corridor in Manhattan, New York City, running along the Fifth / Sixth Avenues / Riverside Drive Line as well as the southern portion of the Broadway Line after the discontinuation o ...

, a New York City Bus route in Manhattan

Roads

M55 motorway The M55 is a motorway in Lancashire, England, which can also be referred to as the Preston Northern Bypass. It connects the seaside resort of Blackpool to the M6 at Preston. It is 12.2 miles (19.6 km) in length. One mile was originally ...

, a road in Lancashire, United Kingdom, connecting Blackpool and the M6 at Preston *

M55 highway (Russia) The Baikal Highway is a federal highway in Russia. Its official designation is federal highway R258 "Baikal" (russian: Федеральная автомобильная дорога Р258 «Байкал»). It part of the Trans-Siberian Highway a ...

, a 1113 km road connecting Irkutsk and Chita *

M-55 (Michigan highway) M-55 is a state trunkline highway in the northern part of the US state of Michigan. M-55 is one of only three state highways that extend across the Lower Peninsula from Lake Huron to Lake Michigan; the others are M-46 and M-72. The highway ...

, a road in Michigan connecting Lake Huron and Lake Michigan *

M55 (Cape Town) The City of Cape Town ( Cape Town metropolitan area) like most South African metropolitan areas, uses Metropolitan or "M" routes for important intra-city routes, a layer below National (N) roads and Regional (R) roads. Each city's M roads are i ...

, a Metropolitan Route in Cape Town, South Africa

Other uses

* M 55, an age group for

Masters athletics Masters athletics is a class of the sport of athletics for athletes of over 35 years of age. The events include track and field, road running and cross country running. Competitors are bracketed into five-year age groups (which promotes fair com ...

Military

Science and technology

Transportation

Roads

Other uses

See also