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OAR [ɔ:] abbr.
abbr.	Organization for Autism Research; Order of Augustinian Recollects (Johnny Bravo)
abbr., account.	overhead absorption rate
abbr., amer.	Oregon Administrative Rule (s Leonid Dzhepko)
abbr., avia.	Office of Airspace Regulation (bonly); Operational Analysis and Resourcing; Operational Analysis Reporting; order as required
abbr., el.	Office of Aerospace Research; one armed router; operand address register; operational analysis report; operator authorization record; organic analysis reagent; output address register; overall area reliability; Oxford Applied Research Co.
abbr., electr.eng.	operand-address register
abbr., IT	Original Aspect Ratio
abbr., Makarov.	operation address register
abbr., med.appl.	organ at risk (vlad-and-slav)
abbr., mil.	Of A Revolution; Chairman of the Joint Chiefs of Staff operation plans assessment report
abbr., nautic., scient.	Office of Oceanic and Atmospheric Research
abbr., O&G. tech.	Occupational Air Requirement (DAKK)
abbr., opt.	off-axis rejection; open area ratio
abbr., physiol., med.	Offal And Regurgitation
abbr., railw.	Old Augusta Railroad Company
abbr., scottish	Operational Analysis & Research
abbr., st.exch.	Ohio Art Company
abbr., stat.	observed at random
abbr., tradem.	Oxford Applied Research
abbr., ukr.usg.	Album Oriented Rock (формат американских FM радиостанций с преобладанием не попавших в хит-парады малоизвестных альбомных песен, в основном, известных исполнителей Viacheslav Volkov)
energ.ind.	operator accelerated retraining
mil., abbr.	operations analysis report; ordnance allowance report; ordnance alteration reporting; ordnance alteration requirements; overhaul and repair
tech., abbr.	operational assessment and readiness; operational availability and reliability; optical angle readout
OAR [ɔ:] abbr.
abbr.	Office of Air Research
abbr., avia.	optically amplified regenerator
abbr., comp.	operational address register
abbr., earth.sc.	ocean applied research model
abbr., med.	office of AIDS research
abbr., oil	Office of Atmospheric Research; organic analytical reagent
abbr., space	operations anomaly report; optical automatic ranging; Office of Aerospace Research
abbr., sport.	Olympic Athletes from Russia (bigmaxus)