Abbreviations that start with the letter: O (6,774 entries)

		O#	Overton Number	Miscellaneous » Coins
		O$$	Outfile (Sprint)	Computing » File Extensions
		O&A	Odontectomy And Alveolectomy	Medical » Physiology
		O&C	Official and Confidential	Governmental » FBI Files
		O&E	Observation and examination	Medical » Physiology
		O&M	Operations and Maintenance	Governmental » Military
		O&M	Operations and Maintenance	Governmental » Transportation
		O&M	Organização e Métodos	Business » International Business
		O&M	Original Equipment Manufacturer	Miscellaneous » Clothes
		O&O	Operational and Organizational	Governmental » Military
		O&O	Organizations and Operations	Governmental » Military
		O&O	Over and Out	Academic & Science » Amateur Radio
		O&OP	Operational and Organizational Plan	Governmental » Military
		O&P	Ova and Parasites	Medical » Laboratory
		O&S	Operations and Support	Governmental » Military
		O+	Female	Internet » Emoticons
		O->	Male	Internet » Emoticons
		O-CONUS	Outside Continental United States	Governmental » Military
		O.B.L.	(shipping) Ocean Bill of Lading	Business » International Business
		O.C.G.A.	Official Code of Georgia Annotated	Community » Educational
		O.O	Confusion	Internet » Emoticons
		O.O	Surprised. Confused. Shocked.	Internet » Emoticons
		O/A	Open Account	Business » International Business
		O/C	Observer/Collector	Governmental » Military
		O/C	Observer/Controller	Governmental » Military
		O/D	Origin and Destination	Governmental » Transportation
		O/D	Overdrive	Governmental » Transportation
		O/DR	Outdoor	Community » Housing
		O/E	On Examination	Medical » Oncology
		O/PLAN	Open Plan	Community » Housing
		O/S	Outside	Community » Housing
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