Popularity	Country/ Region	Term	Definition	Main Category	Subcategory
		OP	Out of print	Miscellaneous » Stationery
		OP	Original Poster	Miscellaneous » Chat slang
		OP	Outpatient	Medical » Hospitals
		OP	Ocean Pacific	Business » Companies & Corporations
		OPAC	Online Public Access Catalog	Academic & Science » Language & Linguistics
		OPAC	Office Proficiency Assessment and Certification	Business » Business Terms
		OPC	OLE for Process Control	Technology » Robotics & Automation
		OPC	One Person Company	Business » Companies & Corporations
		OPC	Optical Proximity Correction	Technology » Energy & Recycling
		OPC	Optimum Power Calibration	Technology » General
		OPC	Orthodox Presbyterian Church	Society & Culture » Religion & Spirituality
		OPC	Office of the Parliamentary Counsel	Governmental » Departments & Agencies
		OPC	Organic Photo-Conductor	Technology » General
		OPC	Opel Performance Center	Sports & Games » Motorsports
		OPC	Ontario Police College	Governmental » Police
		OPC	Otsuka Pharmaceutical Company	Business » Companies & Corporations
		OPC	Oligomeric Proanthocyanidins	Medical » Biochemistry
		OPC	Oodua Peoples Congress	Associations & Organizations » Regional Organizations
		OPC	Ovamboland People’s Congress	Governmental » Politics
		OPD	Oakland Police Department	Governmental » Departments & Agencies
		OPD	Outpatient Department	Medical » Hospitals
		OPD	Orlando Police Department	Governmental » Departments & Agencies
		OPEC	Organization of Petroleum Exporting Countries	Associations & Organizations » Governmental Organizations
		OPEC	Ohio Prevention and Education Conference	Associations & Organizations » Conferences & Events
		OPeNDAP	Open-source Project for a Network Data Access Protocol	Computing » Protocols