What does O.D stand for?

What does O.D mean?

OD	Oder International » German
OD	Optical Density Academic & Science » Ocean Science
OD	OverDose Medical » Physiology
OD	On Demand Community » Media
OD	OverDose Medical » Oncology
OD	OverDose Medical » Hospitals
OD	Outside Diameter Governmental » Transportation
OD	Outside Diameter Academic & Science » Electronics
OD	Opus Dei International » Spanish
OD	Organizational Development Business » General
OD	Organization Development Governmental » US Government
OD	Once Daily Medical » Physiology
OD	Olive Drab Governmental » Military
OD	Origin Destination Governmental » Transportation
OD	Oxygen Demand Medical » Physiology
OD	Open Diary Computing » General
OD	Doctor of Optometry Academic & Science » Academic Degrees
OD	Off Diagonal Academic & Science » Mathematics
OD	Old Dominion Governmental » State & Local
OD	Optical Disk Computing » Hardware
OD	Oxford Dictionary Academic & Science » Universities
OD	Open Drain Academic & Science » Electronics
OD	Omni-Directional Academic & Science » Amateur Radio
OD	Organizational Design Business » General
OD	Occupational Disease Medical » Physiology