What does OB stand for?

What does OB mean?

OB	OberBürgermeister International » German
OB	OBstetrics Medical » Physiology
OB	Obese Medical » Physiology
OB	Obstetrician Business » Positions
OB	Organizational Behavior Business » General
OB	Out Of Bounds Community » Sports
OB	Ocean Beach Governmental » State & Local
OB	Operating Budget Business » General
oB	ohne Befund International » German
OB	Occult Blood Medical » Laboratory
OB	Organisational Behaviour Business » General
OB	Outside Broadcast Community » Media
OB	Outer Banks Academic & Science » Ocean Science
OB	Other Board Computing » General
OB	Order of Battle Governmental » Military
OB	Orlando Bloom Miscellaneous » Unclassified
OB	Office Building Miscellaneous » Unclassified
OB	Operation Blessing Community » Non-Profit Organizations
OB	Old Boys Miscellaneous » Unclassified
OB	Oligosaccharide Binding Academic & Science » Chemistry
OB	Output Block Computing » General
OB	Output Buffer Miscellaneous » Unclassified
OB	One Billion Miscellaneous » Unclassified
OB	Off Broadway Community » Performing Arts
OB	Original Box Miscellaneous » Unclassified

Ob(n.): a river in the W Russian Federation in Asia, flowing NW to the Gulf of Ob. 2500 mi. (4025 km) long.