ISR

ISR is a three-letter abbreviation with multiple meanings, including:

Intelligence, Surveillance and Reconnaissance in a military context
International Socialist Review U.S Socialist magazine.
International Star Registry
International Search Report (in patent law)
Interrupt Service Routine, a software routine that is executed in response to an interrupt
In-Service Register or Interrupt Service Register. In computer science, a register used to indicate which interrupts are in progress.
Information, Storage and Retrieval
Intersecting Storage Rings, a particle collider at CERN
Initial State Radiation, in particle physics
Israel
International Socialist Resistance Socialist Youth Organisation
Information Systems Research, an academic journal in the information systems discipline.

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