# Isa

Isa or ISA may refer to:

## Places

* Isa, Amur Oblast, Russia
* Isa, Kagoshima, Japan
* Isa, Nigeria
* Isa District, Kagoshima, former district in Japan
* Isa Town, middle class town located in Bahrain
* Mount Isa, Queensland, Australia
* Mount Isa Airport, IATA airport code "ISA"
* Isa (river), a river in Belarus

## People

* Īsā, the name of Jesus in Islam
* Isa (name), an Arabic name corresponding to Jesus in English
* Isa, stage name of Lee Chae-young, member of K-Pop group STAYC
* Isa, female given name, short for Isabel or similar names beginning with Isa- such as Isadora
* Isa Maud Ilsen (1868–1937), Canadian-American music therapist, nurse, lecturer
* Isa Tengblad (born 1998), Swedish singer using the mononym Isa
* Juan Isa (1913–1993), president of the International Baseball Federation (FIBA) from 1969 to 1975

## Arts, entertainment, and media
### Fictional entities

* ISA (Days of Our Lives), spy agency in TV series
* Isa the iguana, in TV series Dora the Explorer
* Interplanetary Strategic Alliance (ISA), military alliance in videogame saga Killzone

### Other uses in arts, entertainment, and media

* Isa (Enslaved album), 2004
* Isa (Zaz album), 2021
* Isa (film), a 2014 television film
* Isa, a dance in music of the Canary Islands

## Computing

* Industry Standard Architecture, a PC computer bus standard
* Instruction set architecture, the specification for data types, registers, instructions, etc. for a given computer hardware architecture
* Is-a, a relationship between abstractions in programming
* Internet Security and Acceleration, a network router, firewall, antivirus program, VPN server and web cache from Microsoft Corporation

## Education

* Indian Squash Academy, Chennai, India
* Independent Schools Association (Australia), mainly for sports
* Independent Schools Association (UK), organisation for independent schools in the United Kingdom
* Iniciativa de Salud de las Americas, Spanish name for Health Initiative of the Americas
* Institute for the Study of the Americas, University of London, England
* Instituto Superior de Agronomia, an agronomy faculty in Lisbon, Portugal
* Instituto Superior de Arte, an art school in Havana, Cuba
* International School Amsterdam, the Netherlands
* International School Augsburg
* International School of Aleppo, Syria
* International School of Athens, Greece
* International School of the Americas, San Antonio, Texas
* International Studies Association
* Islamic Saudi Academy

## Finance

* Income share agreement, a borrowing agreement sometimes used for tuition loans in the United States
* Individual savings account, class of retail investment arrangement available in the United Kingdom
* International Standards on Auditing, professional standards for the auditing of financial information.
* Israel Securities Authority, Israel's national securities regulator

## Companies

* Interconexion Electrica, a Colombian company operating energy transmission lines

## Government

* Independent Safeguarding Authority, former UK child protection agency
* Intelligence Services Act 1994, UK
* Intelligence Support Activity, of the US Army
* Internal Security Agency, secret service and counter-espionage agency in Poland
* International Seabed Authority, for mineral-related activities
* International Searching Authority, for patents
* International Solar Alliance
* Interoperability Solutions for European Public Administrations, EU
* Invention Secrecy Act of the United States Congress
* Iranian Space Agency
* Israel Security Agency or Shin Bet, Israel
* Israel Space Agency
* Israel State Archives, the national archive of Israel
* Italian Space Agency

## Organizations and brands

* Industry Super Australia, the peak body for industry superannuation funds in Australia
* Innovative Software Applications, a company taken over by Sorcim in 1982
* International Federation of the National Standardizing Associations
* International Seabed Authority
* International Socialist Alternative, an international association of Trotskyist political parties.
* International Society of Arboriculture, a non-profit botanical organization
* International Society of Automation, a non-profit professional organization for engineers, technicians, and students
* International Sociological Association
* International Soling Association
* International Surfing Association, the world governing authority for the sport of surfing
* Irish Sailing Association, the governing body for sailing in Ireland
* International Slackline Association

## Science

* Isosaccharinic acid, a six-carbon sugar acid
* Intrinsic sympatheticomimetic activity, a term used with beta blockers that are partial agonists
* Infectious salmon anemia, a viral disease of salmon
* International Standard Atmosphere, an atmospheric model of the Earth
* International Seismological Association, former name of the International Association of Seismology and Physics of the Earth's Interior (IASPEI)

## Entomology

* Isa (moth), a genera of moths.

## Other uses

* Intelligent speed adaptation, systems to automatically enforce vehicle speed limits
* International Symbol of Access, blue and white wheelchair symbol
* ISA Brown, type of chicken
* Ideological state apparatus, a theory by Louis Althusser