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OCU abbr.
abbr.	Occasional Commercial Use; Ohio Credit Union League
abbr., BrE	operational command unit
abbr., ed., scient.	Oklahoma City University
abbr., el.	operational conversion unit; oscillator clock unit
abbr., fin.	Operation Coordination Unit
abbr., IT	Objective C Use; Office Channel Unit; Optical Character Unit; output compare unit (Янка)
abbr., med.	Outpatient Care Unit
abbr., mil.	Officer's Christian Union; Operator Control Unit; Order wire Control Unit; orderwire control unit (Types I, II, and III)
abbr., police	Operational Command Unit
abbr., scottish	Operator's Control Unit
abbr., space	optical coupler unit
mil.	operational capabilities upgrade; operational control unit; operational conversion unit
tech.	operational capability update
Игорь Миг, abbr.	the Orthodox Church of Ukraine