B/O stands for;

S/NO Abbr.Meaning
1BOBachelor of Oratory
2BOBack Office
3B/OBack Order
4BOBack Order
5BOBack Orifice (trojan horse utility)
6BOBad Order
7BOBanco de Occidente (Spanish: Western Bank; Honduras)
8BOBang and Olufsen
9BOBarack Obama (44th US president)
10BOBarrel of Oil (oil and gas exploration)
11BOBarring Order
12BOBase Order
13BOBase-Out Prism
14B/OBattery Operated
15BOBattery Operated
16BOBattle Operations
17BOBattle Orders (Diablo 2 game)
18B/OBearer Only
19BOBearing Observed
20BOBeat Oscillator
21BOBelarus
22BOBench Order
23BOBeneficial Occupancy
24BOBenefits Office
25B/OBest Offer
26BOBest Offer
27BOBiarritz Olympique (French rugby team)
28BOBig O (anime)
29BOBilans Otwarcia (opening balance)
30BOBilling Official (US DoD)
31BOBinary Option (trading)
32BOBinary Output
33BOBinary to Octal
34BOBiodiversity Offsetting (conservation)
35B/OBiological Opinion
36BOBiological Opinion
37BOBit Oxide
38BOBlack Ore (Lineage 2 game)
39BOBlack Organization (Detective Conan)
40BOBlackout
41BOBloc Opératoire (French: Operating Room)
42BOBlocked Out
43BOBlocking Oscillator
44B/OBlocking Oscillator
45BOBlood Omen (game)
46BOBloody Orchid (Lineage 2 game)
47BOBlow-Off
48BOBlue October (band)
49BOBoarding Officer
50BOBochum (Germany)
51BOBody Odor
52BOBody Odour (gaming group)
53BOBoletim de Ocorrência (Accident Report; Brazil)
54BOBoletín Oficial (Spanish: Official Gazette; Argentina)
55BOBolivia
56BOBologna (Emilia Romagna, Italy)
57BOBom Pra Otário (Brazil)
58BOBonus Objective (gaming)
59BOBoom Operator (USAF in-flight refueling)
60BOBooster Orbiter
61BOBorn Organized
62BOBorrow Output (electrical circuits)
63BOBottom Opened (can collectors)
64BOBourget-Opéra (French)
65BOBowel Opening (anatomy)
66BOBowled Over
67BOBox Office
68BOBrain Overload
69BOBranch Office
70BOBranch on Ones (IBM)
71BOBranch on Overflow (IBM)
72BOBranchiootic
73BOBreak Off
74B/OBreakout
75BOBreakout Box
76BOBridge Officer (gaming)
77B/OBroken Object
78BOBronchiolitis Obliterans
79BOBruto Oppervlakte (Dutch: Gross Area)
80BOBucked Off (rodeo)
81B/OBudget Obligation
82BOBudget Obligations
83BOBudget Outlay
84B/OBudget Outlay
85BOBuffer Overflow/Overrun
86BOBuild Order
87BOBulletin Officiel (French)
88BOBurnout
89BOBus Operator
90BOBusiness Object
91BOBusiness Office
92BOBusiness Opportunity
93BOBusy Out
94BOBuyer’s Option
95B/OBuyout (auctions)
96BOBuzz Off
B/O
Share
Abbreviations And Their Meaning