ISR

ISR may refer to:

Organizations

 * Institute for Strategy and Reconciliation
 * Institutional and Scientific Relations, of the European Commission
 * International Star Registry, a company selling the right to name stars
 * ISR International School on the Rhine, Germany

Publications

 * ISR, a socialist magazine, 1900-1918
 * Information Systems Research
 * International Socialist Review (disambiguation), U.S. publications
 * International Statistical Review
 * International Studies Review
 * Israel Studies Review

Biology

 * In-stent restenosis, recurrence of stenosis after stenting
 * Plant-induced systemic resistance, plant response to infection

Computers

 * In-Service Register or Interrupt Service Register, in a PIC
 * Interrupt service routine

Other science

 * In-situ recovery, a mining technique
 * Incoherent scatter radar, for studying the ionosphere
 * Intersecting Storage Rings, a particle collider at CERN
 * Injection site reaction, a reaction that occurs initially at the site of an injection or infusion

Other uses

 * ISR, country code for Israel
 * Indiana Southwestern Railway, US
 * Inuvialuit Settlement Region, Northwest Territories, Canada
 * Ipoh-KL Sentral Route, a train service, Malaysia
 * ISR Racing, a team from Czech Republic
 * Israir (designator ISR), an Israeli airline
 * Italian Social Republic, 1943–1945
 * Joint Functional Component Command for Intelligence, Surveillance and Reconnaissance, of the US Strategic Command
 * Intelligence, surveillance and reconnaissance, in military intelligence
 * International Search Report, in international patent law