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IAR abbr.
abbr.	Imagery Analysis Report; Inactive Air Reserve; Initial Address Reject; Institute for Atomic Research; International Association of Refrigeration
abbr., auto.	intake air-resonator; integrated regulator
abbr., avia.	instrument approach runway; integrated avionics rack
abbr., ed., scient.	Institute of Audio Research
abbr., el.	indirect address register; intelligent automatic rerouting; interrupt address register; ion/atom ratio
abbr., inet.	I Am Replying
abbr., insur.	Industrial All Risks (Studiozus)
abbr., IT	Information Access Request ((BHI) can be used to request a network ID, basic system access, access to applications, and access to network resources Nina_Strogonova)
abbr., med.	infusion-associated reaction (Rive); injection-associated reaction (Rive); iodine-azide reaction
abbr., mil.	Interoperability Assessment Report; interoperability assessment report
abbr., mil., air.def.	integrated aircraft carrier raft
abbr., O&G, sakh.	Improvement Action Register (аудит)
abbr., vet.med., med.	International Animal Rescue
airports, avia.	Yaroslavl, Russia
mil.	individual action report; instruction address register; intelligence acquisition and reporting; interchangeability and replaceability; inventory adjustment report
tech.	irradiation-anneal-reirradiation; isobar-analog resonance
iar abbr.
abbr.	intersection of air routes
IAR abbr.
abbr., oil	inspection acceptance record