RSA

RSA may refer to:

Academia and education

 * Rabbinical Seminary of America, a yeshiva in New York City
 * Regional Science Association International (formerly the Regional Science Association), a US-based learned society
 * Renaissance Society of America, a scholarly organization based in New York City
 * Rhetoric Society of America, an academic organization for the study of rhetoric
 * Royal Scottish Academy, a Scottish institute of the Arts
 * Royal Society of Arts, a British charitable organisation, formally the Royal Society for the Encouragement of Arts, Manufactures and Commerce

Military

 * Redstone Arsenal, a United States Army post adjacent to Huntsville, Alabama
 * Royal New Zealand Returned and Services' Association, an organization for the welfare of veterans of New Zealand's military
 * Royal School of Artillery, a British Army training establishment for artillery warfare
 * Royal Signals Association, an organization for serving and retired members of the Royal Corps of Signals, of the British Army

Other organizations

 * RSA Insurance Group (Royal and Sun Alliance), United Kingdom
 * RSA Security, a US network security company
 * Rehabilitation Services Administration, a US Department of Education agency
 * Retirement Systems of Alabama, US
 * Ridley Scott Associates, a UK film company
 * Road Safety Authority, Ireland
 * Russian Ski Association

Places

 * Republic of South Africa, IOC country code
 * Santa Rosa Airport (Argentina), in La Pampa province (IATA code RSA)

Biology, organic chemistry, and medicine

 * Respiratory sinus arrhythmia, the heart rate variation due to respiration
 * Retrosynthetic analysis, in organic chemistry
 * Rsa RNA, partially characterised non-coding RNA from Staphylococcus aureus

Cryptography and security

 * RSA (cryptosystem) (Rivest–Shamir–Adleman), for public-key encryption
 * RSA Conference, annual gathering
 * RSA Factoring Challenge, for factoring a set of semi-prime numbers
 * RSA numbers, with two prime numbers as factors

Other uses in science and technology

 * RSA (missile), a Swiss-developed surface-to-air missile system
 * Rational Software Architect, part of IBM Rational Application Developer
 * Remote supervisor adapter, an out-of-band management interface on IBM servers
 * Revolver Stechkina-Avraamova, a designation of the Russian OTs-01 Kobalt revolver
 * Roentgen stereophotogrammetric analysis, also called radiostereometric analysis, a method of calculating 3D orientation using X-ray images

Other uses

 * Ray Steadman-Allen, a composer of music
 * Repressive state apparatuses, a concept in Louis Althusser's philosophy
 * Responsible Service of Alcohol, alcohol server training in several Australian states
 * Revenu de solidarité active, French benefit for low-paid workers
 * New Hampshire Revised Statutes Annotated, an entire body of laws
 * Runway safety area, or runway end safety area, for aircraft