ACR may refer to:

Aviation

* IATA airport code for

Araracuara Airport Araracuara Airport is an airport serving Araracuara, Colombia, Araracuara, in the Caquetá Department of Colombia. Araracuara was the site of a former penal colony for Colombia's worst and most dangerous criminals. The town and airport are on the ...

in Caquetá Department, Colombia * Aircraft Classification Rating

Medicine

* Albumin/creatinine ratio in urine * ACR gene, encoding the enzyme acrosin * ACR score for rheumatoid arthritis *

American College of Radiology The American College of Radiology (ACR), founded in 1923, is a professional medical society representing nearly 40,000 diagnostic radiologists, radiation oncologists, interventional radiologists, nuclear medicine physicians and medical physicists ...

American College of Rheumatology The American College of Rheumatology (ACR; until 1985 called American Rheumatism Association) is an organization of and for physicians, health professionals, and scientists that advances rheumatology through programs of education, research, advocac ...

Places

* Accrington railway station, UK, National Rail code

Railways

* Alaska Central Railroad, original name of the

Alaska Railroad The Alaska Railroad is a Class II railroad that operates freight and passenger trains in the state of Alaska. The railroad's mainline runs between Seward, Alaska, Seward on the southern coast and Fairbanks, Alaska, Fairbanks, near the center of ...

* Alberta Central Railway, an historical railroad in Alberta, Canada *

Algoma Central Railway The Algoma Central Railway is a railway in Northern Ontario, Canada, that operates between Sault Ste. Marie, Ontario, Sault Ste. Marie and Hearst, Ontario, Hearst. It used to have a branch line to Wawa, Ontario, Wawa. The area served by th ...

, a railroad in Northern Ontario, Canada *

Anglesey Central Railway The Anglesey Central Railway (Welsh: ''Lein Amlwch'', ''Amlwch Line'') was a standard-gauge railway in Anglesey, Wales, connecting the port of Amlwch and the county town of Llangefni with the North Wales Coast Line at Gaerwen. Built as an in ...

, a railroad in Wales, UK

Science and technology

Absolute Category Rating Absolute Category Rating (ACR) is a test method used in quality Quality may refer to: Concepts *Quality (business), the ''non-inferiority'' or ''superiority'' of something *Quality (philosophy), an attribute or a property *Quality (physics), in ...

, a subjective quality test method * Acumulador de Carga Rápida, a battery electric tram system * Adobe Camera Raw, a raw image file converter * Advanced CANDU reactor, a nuclear reactor * Advanced Communications Riser, a PC slot format * Advanced Contrast Ratio or

Dynamic Contrast The contrast ratio (CR) is a property of a display system, defined as the ratio of the luminance of the brightest shade (white) to that of the darkest shade (black) that the system is capable of producing. A high contrast ratio is a desired aspe ...

in an LCD display *

Anonymous call rejection In many voice telephone networks, anonymous call rejection (ACR) is a calling feature implemented in software on the network that automatically screens out calls from callers who have blocked their caller ID information. The caller usually hear ...

, a voice telephone network calling feature *

Antarctic Cold Reversal The Antarctic Cold Reversal (ACR) was a climatic event of intense atmospheric and oceanic cooling across the southern hemisphere (>40°S) between 14,700 and 13,000 years before present ( BP) that interrupted the most recent deglacial climate warm ...

, climatic cooling about 14,500 years ago * Anti Cam-Out Recess, an improved Philips screwdriver * Attenuation-to-crosstalk ratio of communication links *

Automatic content recognition Automatic content recognition (ACR) is a technology used to identify content played on a media device or presented within a media file. Devices with ACR can allow for the collection of content consumption information automatically at the screen or ...

of video * Copper tubing for air conditioning and refrigeration

Military and weapons

* AČR,

Army of the Czech Republic The Czech Armed Forces (), also known as the Czech Army, are the military responsible for the defence of the Czech Republic as the main part of the Armed Forces of the Czech Republic (). The Czech Armed Forces led by the Staff (military), Gen ...

(''Armáda České republiky'') * Adaptive Combat Rifle *

Advanced Combat Rifle The Advanced Combat Rifle (ACR) was a United States Army program, started in 1986, to find a replacement for the M16 assault rifle. Under the stress of battle the average soldier with an M16 may shoot a target at 45 meters, but hit probability i ...

, a US Army program *

Armored cavalry regiment An armored cavalry regiment (ACR) is a regiment of the United States Army (Active Component, or Reserve Component (Army Reserve or Army National Guard)) organized for the specific purposes of reconnaissance, surveillance, and security. The regim ...

of the US army or national guard *

Steyr ACR The Steyr ACR was a prototype flechette-firing assault rifle built for the US Army's Advanced Combat Rifle program of 1989/90. Although the Steyr Steyr (; ) is a statutory city (Austria), statutory city, located in the Austrian federal state of ...

, an Austrian assault rifle * A US Navy hull classification symbol: Armored cruiser (ACR)

Other uses

* Accelerated chart ratio, affects streaming totals in the Official Charts Company's singles chart *

Achi language Achi (''Achí'' in Spanish) is a Mayan language very closely related to Kʼicheʼ (''Quiché'' in the older orthography). It is spoken by the Achi people, primarily in the department of Baja Verapaz in Guatemala. There are two Achi dialects. ...

, a Mayan language of Guatemala * Americas Cardroom, online poker site * A Certain Ratio, a British post-punk band * Dodge Viper ACR, a car {{Disambiguation