ISR

Noun

Meaning

(countable, software) Initialism of interrupt service routine.
This function registers an interrupt service routine (ISR) with the kernel

(uncountable, espionage) Initialism of intelligence, surveillance, reconnaissance (“spycraft”).

Source: en.wiktionary.org

Examples

After developing a primitive theory (1968) I therefore did not pursue this subject. However, the work was taken up by others and in 1974 the first experiments were done in the ISR. Simon van der Meer

Airships and aerostats are operated to provide intelligence, surveillance, and reconnaissance (ISR) support. Source: Internet

As the freeze wall holes are vertical and situated around the perimeter of the mining zone, there is minimal risk of the subsequent drilling of ISR wells intersecting and damaging a freeze hole. Source: Internet

It provides navies with an “eye in the sky,” an embedded, enhanced intelligence, surveillance, and reconnaissance (ISR) capability. Source: Internet

He explained that this was achieved in night-time air strikes executed on Dec.31 2019, pursuant to series of Intelligence, Surveillance and Reconnaissance (ISR) missions. Source: Internet

In fact, in 2017, Indian Army Chief Gen. Bipin Rawat realised the need for indigenized ISR capabilities. Source: Internet

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