▁or ▁B ▁or ▁both ") ▁ ▁O dd s ▁ratio , ▁a ▁measure ▁of ▁effect ▁size ▁in ▁statistics ▁ ▁Other ▁uses ▁in ▁science ▁and ▁technology ▁ ▁OR , ▁a ▁previous ▁title ▁of ▁the ▁Journal ▁of ▁the ▁Oper ational ▁Research ▁Society ▁ ▁Oper ating ▁room , ▁in ▁medicine ▁ ▁Oper ations ▁research , ▁or ▁oper ational ▁research , ▁in ▁British ▁English ▁ ▁Oper ations ▁read iness ▁ ▁Tit les ▁and ▁ranks ▁▁ ▁Official ▁receiver , ▁a ▁stat ut ory ▁office ▁holder ▁in ▁England ▁and ▁Wales ▁ ▁Order ▁of ▁R ora ima ▁of ▁Guy ana , ▁an ▁award ▁of ▁the ▁Republic ▁of ▁Guy ana ▁ ▁Other ▁ranks ▁( Den mark ), ▁military ▁personnel ▁in ▁all ▁branches ▁of ▁the ▁Dan ish ▁military ▁that ▁are ▁not ▁officers ▁by ▁the ▁NAT O ▁system ▁of ▁ranks ▁and ▁ins ign ia ▁ ▁Other ▁ranks ▁( UK ), ▁personnel ▁who ▁are ▁not ▁commission ed ▁officers , ▁usually ▁including ▁non - comm ission ed ▁officers ▁( N CO s ), ▁in ▁militar ies ▁of ▁many ▁Commonwealth ▁countries ▁ ▁Other ▁uses ▁▁ ▁Official ▁Records ▁of ▁the ▁American ▁Civil ▁War ▁ ▁Olympic ▁record , ▁a ▁term ▁for ▁the ▁best ▁performances ▁in ▁Olympic ▁Games ▁ ▁Or ▁( her ald ry ), ▁a ▁gold ▁or ▁yellow ▁t inct ure ▁( from ▁the ▁French ▁word ▁for ▁" g old ") ▁ ▁O wn ▁Rec ogn iz ance , ▁the ▁basis ▁for ▁re le asing ▁someone ▁await ing ▁trial ▁without ▁b ail ▁ ▁See ▁also ▁▁ ▁' 0 r ' ▁( zero ▁r ), ▁meaning ▁" no ▁ro