What does op stand for?

Opera - Works - Italian

Operate (IDOE)

Operation (ELAL)

Operational (IDOE)

Operative - Therapy term (CTAA)

Operator (IDOE)

Opposite (WDMC)

Optional (ELAL)

Opus (WDMC)

Order of Preachers, Dominican Fathers (TOCD)

Out of Print - Publishing (WDMC)

Outport (SAUS)

Overprint - Journalism (WDMC)

Air Panama Internacional - ICAO designator (AD)

Dominican Contemplative Nuns (Cloistered) (TOCD)

Dominican Rural Missionaries (TOCD)

Dominican Sisters (Adrian, MI) (TOCD)

Dominican Sisters (Akron, OH) (TOCD)

Dominican Sisters (Amityville, NY) (TOCD)

Dominican Sisters (Blauvelt, NY) (TOCD)

Dominican Sisters (Caldwell, PA) (TOCD)

Dominican Sisters (Colombia) (TOCD)

Dominican Sisters (Columbus, OH) (TOCD)

Dominican Sisters (Ecuador) (TOCD)

Dominican Sisters (Edmonds, WA) (TOCD)

Dominican Sisters (Fall River, MA) (TOCD)

Dominican Sisters (Grand Rapid, MI) (TOCD)

Dominican Sisters (Great Bend, KS) (TOCD)

Dominican Sisters (Hawthorne, NY) (TOCD)

Dominican Sisters (Houston, TX) (TOCD)

Dominican Sisters (Justice, IL) (TOCD)

Dominican Sisters (Kenosha, WI) (TOCD)

Dominican Sisters (Media, PA) (TOCD)

Dominican Sisters (Nashville, TN) (TOCD)

Dominican Sisters (Newburgh, NY) (TOCD)

Dominican Sisters (New Orleans, LA) (TOCD)

Dominican Sisters of Carondelet (TOCD)

Dominican Sisters of Charity of the Presentation of the Blessed Virgin (TOCD)

Dominican Sisters of Mt. Thabor (TOCD)

Dominican Sisters of Our Lady of the Most Holy Rosary (TOCD)

Dominican Sisters of Our Lady of the Rosary and of Saint Catherine of Siena, Cabra (TOCD)

Dominican Sisters of the Roman Congregation (TOCD)

Dominican Sisters (Ossining, NY) (TOCD)

Dominican Sisters (Oxford, MI) (TOCD)

Dominican Sisters (Oxford, South Africa) (TOCD)

Dominican Sisters (Racine, WI) (TOCD)

Dominican Sisters (San Jose, CA) (TOCD)

Dominican Sisters (San Rafael, CA) (TOCD)

Dominican Sisters (Sinsinawa, WI) (TOCD)

Dominican Sisters (Sparkill, NY) (TOCD)

Dominican Sisters (Spokane, WA) (TOCD)

Dominican Sisters (Springfield, IL) (TOCD)

Dominican Sisters (St. Catherine, KY) (TOCD)

Dominican Sisters (Tacoma, WA) (TOCD)

Dominican Sisters (Vietnam) (TOCD)

Eucharistic Missionaries of St. Dominic (TOCD)

Hermanas Dominicanas de la Doctrine Cristiana (TOCD)

Marian Society of Dominican Catechists (TOCD)

Null Operator - Linguistics (IEL)

Oaklawn Park, AK - North American horse racing tracks (HRTC)

Object Program (IAA)

Obligated Position - Civil Service

Observation Patrol (SAUS)

Observation Plane

Observation Point - or Post

Observation Post - Military

Observed Position - Navigation

Obstructive Pancreatitis - Medicine (MELL)

Occasional Paper

Occipitoparietal - Medicine (AAMN)

Occiput Posterior - Medicine

Occupational Psychologist

Oceanus Procellarum - Lunar area

Octapeptide - Biochemistry

Offering Price

Office of Personnel - Department of Agriculture (GFGA)

Office of Pesticides - Public Health Service

Office of Planning (SAUS)

Office of Policy - NASA

Office of Preparedness (DNAB)

Office of Protocol (SAUS)

Office of the president (SAUS)

Office Pass (AAG)

Office Power (SAUS)

Office Printer (SAUS)

Office Processor (SAUS)

Office Product (IAA)

Officer Program - Military (DNAB)

Official Publication (ADA)

Oilpalm - Soil biology - Human-introduced crops (QSUL)

Oil Pressure

Oilproof

Oil Pump

Old Particular - Marsala

Old - Previously seen Patient

Old Pattern - British military (DMA)

Old Persean (WDAA)

Old Persian - Language, etc.

Old Portuguese - Linguistics (IEL)

Old Price - Riots - Occurred for 67 nights, beginning December 30, 1808, opening night of rebuilt Covent Garden Theatre, London, because of new and higher prices

Old Process (SAUS)

Old Prussian - Linguistics (IEL)

Olfactory Peduncle - Medicine (DMAA)

Omega Project (EA)

Opaque - Envelopes

Open - Stock exchange term

Opening Pressure - Medicine

Opening Price - Stock exchange term

Opening Purchase - Stock exchange term

Open Pit (SAUS)

Open Policy

Open Position - Dancing

Opera

Operand - Computer science

Operate

Operating - Motor vehicle violation code used in state of Maryland (MVRD)

Operating Plan

Operating Point (IAA)

Operating Policy - Military

Operating Potential (SAUS)

Operating Procedure - Management term (KSC)

Operating Profit - DoD

Operation (AFM)

Operational (CAAL)

Operational Performance (SAUS)

Operational Priority

Operational Procedure (MCD)

Operational Process (SAUS)

Operational Project - Army (AABC)

Operation Overlord Preparations - World War II

Operation Part (SAUS)

Operation Plans

Operations (KSC)

Operations Order (MCD)

Operations Plan (IAA)

Operative Procedure

Operator - Computer science

Operator Panel (SAUS)

Operator Performance (SAUS)

Operator Position (SAUS)

Operator Precedence (SAUS)

Ophthalmology

Opinion (ADA)

Opium (SAUS)

Opportunity - Telegraphy (PCTE)

Opposed (NVT)

Opposite

Opposite Prompt - i.e., the left side - A stage direction

Optical Probe (AAG)

Optical Properties (SAUS)

Optical Technician Program - Association of Independent Colleges and Schools specialization code

Optime - Best - Latin (ROG)

Optimum Programming (SAUS)

Optional

Optional Flag - Navy - British

Opus - Work - Latin

Orange Pekoe - Tea

Orbital Period (AAG)

Orbital Probe - NASA

Ordering Possibility (SAUS)

Order of Preachers (Dominicans) (TOCD)

Order of Preceptors

Order Parameter (SAUS)

Order Policy - Insurance

Ordinary Pay (SAUS)

Ordinis Praedicatorum - Of the Order of Preachers, or Dominicans - Latin

Ordnance Pamphlets

Ordnance Personnel

Ordnance Publications - Navy (MCD)

Ordo Praedicatorum - Order of Preachers - Dominicans - Roman Catholic religious order

Organic Phosphates (GNE)

Organization Problem (SAUS)

Organophoshate

Organophosphorus - Organic chemistry

Oriented Polymer (SAUS)

Orient Press - Press agency - South Korea

Original Pack (DB)

Original Policy (ADA)

Original Poster (CAL)

Original Premium - Insurance

Orthogonal Polynomial (OA)

Orthogonal Processor (SAUS)

Orthomat Plot (MCD)

Ortho-Phosphate (SAUS)

Oscillatory Potentials (SAUS)

Osmotic Pressure

Osteopoetin - Biochemistry

Osteoporosis - Orthopedics (DAVI)

Osterogenic Protein

Other Papers (ROG)

Other People's - Borrowed money, cigarettes, etc. - Slang

Other Person (TRID)

Other Procurement

Other than Psychotic

Outer Panel (AAG)

Out-of-Press - Recordings

Out of Print - Also, OOP - Publishing

Outpatient - Medicine

Outpost

Out Primary (SAUS)

Output (AAG)

Output Point (SAUS)

Output Port (CCCA)

Output Primary - Electronics

Output Printer (SAUS)

Output Processor (SAUS)

Output Puncher (SAUS)

Outside Production

Overall Position - Tertiary entrance

Overflow Position (ELAL)

Overpotential (SAUS)

Over Pressure (AAG)

Overpressure (SAUS)

Overprint

Over Proof (SAUS)

Overproof - Distilling

Overprune (SAUS)

Overpuff (SAUS)

Overseas Post (ADA)

Overtime Pay (MHDB)

Ovine Prolactin - Endocrinology

Own Protection (WDAA)

Oxazolinylphenoxy - Organic radical

Oxygen Point (SAUS)

Oxygen Pressure Process - Ore leach process

Oxygen Purge - NASA (NASA)

Ozone Protection - Environmental science (COE)

Paulding County Carnegie Public Library, Paulding, OH - Library symbol - Library of Congress (LCLS)

Perth Public Library, Ontario - Library symbol - National Library of Canada (NLC)

Religious Missionaries of St. Dominic (Spanish Prov.) (TOCD)

De Opficio Mundi - Philo (BJA)

Opera et Dies - of Hesiod - Classical studies (OCD)

Opus

Oregon pine (SAUS)