ASR may refer to:

Military

• A US Navy hull classification symbol: Submarine rescue vessel (ASR)

• U.S. Army Service Ribbon

Organizations and publications

• ASR Nederland, a Dutch insurance company

• Academy at Swift River

• Erkilet International Airport, Turkey, IATA code

• Anderson Serangoon Junior College, pre-university institution in Singapore

Science

• Ancestral sequence reconstruction, to infer ancient DNA sequences

• Acute stress reaction to traumatic event

• Adult sex ratio of males to females

• Alkali–silica reaction, affecting sensitive aggregates and causing concrete expansion and failure

• Analyte-specific reagent, a class of biological molecules

• Asian soybean rust, a plant disease

• Age-standardized rates of a phenomenon in a series of populations

• Audio sampling rate

Technology

• Automatic speech recognition

• Automotive shredder residue, of shredded automobiles

• Aquifer storage and recovery, of potable water in an aquifer

• Airport surveillance radar

• Asr (radar), an Iranian radar system

• Arithmetic shift right, a computer instruction

• Answer-seizure ratio, the percentage of telephone calls that are answered

• Traction control system, from German Antriebsschlupfregelung (Acceleration Slip Regulation), system to prevent loss of traction on vehicles

• Automatic Send Receive on a teletype

• Teletype ASR 33, a specific model teletype, commonly used for early day minicomputers

• Architecturally Significant Requirements

Software

• Apple Software Restore, a command line utility in Mac OS X

• Automated system recovery, a Microsoft Windows XP function

• Attack surface reduction, a fundamental principle of security

Transport

• Air-sea rescue

• State Railway of Thailand ASR class

• Australian Southern Railroad, a former rail freight operator

Other uses

• Asr, the daily afternoon prayer in Islam

• Accelerated share repurchase, whereby companies buy back shares

• ASMR (autonomous sensory meridian response), a tingling sensation