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O.B.
abbr., AmE	obstetrician-gynecologist (акушер-гинеколог; тж. ob-gyn Taras)
abbr., earth.sc.	observation balloon
abbr., econ.	ordered back; outboard
abbr., inf.	obstetrician (alia20)
abbr., insur.	Out board
abbr., interntl.trade.	other budget
abbr., logging	over bark
abbr., radio	outside broadcast
abbr., sport, bask.	old boy
O/B
abbr., busin.	on behalf of; order book; ordinary business
abbr., exhib.	ocean freight
abbr., interntl.trade.	opening bank
abbr., mil.	order of battle; outboard
abbr., O&G, sakh.a.	overboard
abbr., space	operational base
o/b
gen.	on behalf (miracle_v07)
abbr.	on or before
busin.	outstanding balance
insur.	On board
O. B.
abbr., fin.	order book
o.b.
O&G	oil-base mud

O.B: 1 phrase in 1 subject

Abbreviation

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