What does OC stand for?

Air California - Air carrier designation symbol (AD)

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

Degrees Celsius

Jersey. Ordres du Conseil - A publication (DLA)

Macau - NCIC country-territory code (NCIC)

Oakwood College (SAUS)

Obayashi Corporation (EFIS)

Oberlin College (AD)

Object Class - Military

Object Computer (SAUS)

Objective Capability

Oblate College (AD)

Observation Car - British

Observer Computer (SAUS)

Observer Controller - Military technology (DDF)

Observer-Controller - Army

Observer Corps - Became ROC, 1941 - British

Obsessive Compulsive (PAZ)

Obstacle Clearance (PDAA)

Obstetric Conjugate - Pelvic measurement - Gynecology

Obstruction Chart

Occidental

Occidental College (AD)

Occipital Cortex - Brain anatomy

Occlusocervical - Dentistry

Occulentum - Medicine (CPH)

Occupied - International telex abbreviation (WDMC)

Occurs (MDG)

Ocean

Oceanographic Devices - JETDS nomenclature - Military (CET)

O'clock - Telegraphy (PCTE)

Octal Code (SAUS)

Octane Control - Automotive engineering

October (ADA)

Ocular - Microscopy

Oculentum - Eye Ointment - Pharmacy

Odessa College (AD)

Odor Control

Oedipus Coloneus - of Sophocles - Classical studies (OCD)

Of Course

Off-Camera - Film (WDMC)

Off Center (WGA)

Off Cover (SAUS)

Offensive Center - Football

Office Call - Medicine

Office Communication

Office Consultation (AD)

Office Copy

Office of Censorship - Terminated, 1945 - Military

Office of Compliance - U.S. Food and Drug Administration

Office of the Commissioner - Office of Education

Office of the Comptroller

Officer Candidate - Military

Officer Commanding - Military

Officer in Charge (AD)

Officer, Order of Canada - Decoration (CMD)

Officers' Cook

Official Circular - Poor Law Board, etc. - A publication (DLA)

Official Classification

Official Communication (SAUS)

Off-Machine Coated - Paper (DGA)

Ohio College (AD)

Oil and Gas Investigation Chart - United States Geological Survey (GIS)

Oil Consumption - Fuels and lubricants

Oil Cooler

Oiler Contact (SAUS)

Okolona College (AD)

Old Carthusian

Old Category Code (NITA)

Old Catholic

Old Chap - Amateur radio shorthand (WDAA)

Old Cheltonian - British (ROG)

Old Code - Louisiana Code of 1808 - A publication (DLA)

Old Crop

Oleoresin Capsicum (BARN)

Olin - Federal Railroad Administration identification code

Olivet College (AD)

Olympic College (AD)

On Call (BUR)

On Camera (WDMC)

On Cards

On Center - Technical drawings

On-Condition (NASA)

On Consignment (MHDB)

On Course - Navigation

Online Chronicle (NITA)

Only Child

Ope Consilio - By Aid and Counsel - Latin - Legal term (DLA)

Open Channel (SAUS)

Open Charter - Business term

Open Chock - Shipfitting

Open Circuit

Open Circuited (SAUS)

Open Circular - Configuration of DNA - Microbiology

Open Cockpit (SAUS)

Open Coil (SAUS)

Open Collector (IAA)

Open College (AIE)

Open Commitment (SAUS)

Open Contract

Open Control (SAUS)

Open Crossing (HEAS)

Open Cup - Electronics

Opera-Comique - Comic Opera - French (AD)

Opera Company (AD)

Operand Channel (SAUS)

Operating Characteristic

Operating Coil (IAA)

Operating Company

Operating Contractor (SAUS)

Operating Control (SAUS)

Operating Curve (NRCH)

Operational Calculus (SAUS)

Operational Capability (AAG)

Operational Characteristic (SAUS)

Operational Check (MCD)

Operational Circular (HEAS)

Operational Command (SAUS)

Operational Computer (IEEE)

Operational Concept (SAUS)

Operational Condition (SAUS)

Operational Control (SAUS)

Operation Code (IAA)

Operation CORK - Joan B. Kroc Foundation - CORK is derived from the foundation name - Defunct (EA)

Operation Crossroads - Atomic weapons testing

Operations Center - Military

Operations Chief - Deep Space Network, NASA

Operations Commence (SAUS)

Operations Communications (SAUS)

Operations Conductor (MUGU)

Operations Contract (SAUS)

Operations Control

Operations Controller (SAUS)

Operations Coordinator (SAUS)

Operator Call (SAUS)

Operator Centralization (VLIE)

Operator Circuit - Telecommunications (IAA)

Operator Command (NITA)

Opere Citato - In the Work Cited - Latin (WDAA)

Opportunity Cost (MHDB)

Optical Carrier

Optical Cavity - LASER technology (EECA)

Optical Center (SAUS)

Optical Channel (SAUS)

Optical Communication (ELAL)

Optical Computer (SAUS)

Optical Coupler (SAUS)

Optic Chiasm - Anatomy

Optimal Control (SAUS)

Optimizing Control (SAUS)

Optometric Corp. (AD)

Oral Care - Denistry (DAVI)

Oral Contraceptive - Endocrinology

Orbital Check (MCD)

Order Canceled

Order Card

Order Code (SAUS)

Order Confirmation (SAUS)

Order in Council - A publication (DLA)

Orderly Corporal - British

Order of Canada (SAUS)

Order of Cistercians - Roman Catholic religious order

Ordinary Capital Account - Inter-American Development Bank

Ordinary Chondrite - A type of meteorite

Ordinary Colourless (SAUS)

Ordnance Chart (MCD)

Ordnance College - Military - British (ROG)

Ordo Charitatis - Fathers of the Order of Charity - Roman Catholic religious order

Organic Carbon

Organic Chemistry (SAUS)

Organizational Chart

Organochlorine - Also, OCL - Organic chemistry

Organo Corale - Choir Organ - Latin (AD)

Organ of Consultation

Oriel College (AD)

Oriens Christianus - A publication (ODCC)

Orienteering Club (ODA)

Original Character - Invented by fanfiction author for purposes of a particular story

Original Claim (MAE)

Original Cosmopolitans - Defunct (EA)

Original Cover

Orion Capital Corp. - NYSE symbol (SPSG)

Orlando College (AD)

Orphans' Court (DLA)

Oscillating Current (SAUS)

Osteocalcin - Biochemistry

Osteochondritis (DB)

Osteocyte (SAUS)

Otero College (AD)

Otter Controls Ltd. (SAUS)

Oudh Cases - India - A publication (DLA)

Out Cold - Slang

Outer Canthus (DB)

Outflow Channels - A filamentary mark on Mars

Outing Club

Outlet Contact

Output Card (SAUS)

Output Class (SAUS)

Output Code (SAUS)

Output Computer

Output Controller (VLIE)

Outside Circumference (MSA)

Outsiders Club (EAIO)

Over Center (SAUS)

Over-Compounded (SAUS)

Overcorrected (SAUS)

Overcurrent

Overhaul Cycle (SAUS)

Overseas Chinese (AD)

Overseas Commands - Air Force

Overseas Country (ODBW)

Over-the-Horizon Compressed (MCD)

Oxidation Catalyst - Automotive engineering

Oxide Cathode (SAUS)

Oxygen Chemisorption (SAUS)

Oxygen Consumed

Oxygen Cutting - Welding

Public Library of Cincinnati and Hamilton County, Cincinnati, OH - Library symbol - Library of Congress (LCLS)

Occulting Light - Navigation signal

Ocean (AD)

Octahedral - Molecular geometry

Octyl - Biochemistry

Obstetrical Conjugate - Medicine (AD)

Ocean (AD)

Odor Control (AD)

On Camera (AD)

On Center (AD)

On-Condition (NAKS)

Open Charter (AD)

Open Circuit (NAKS)

Open Cup (AD)

Opera Comique - Music (GROV)

Oral Contraceptive - Medicine (AD)

Orbital Check - NASA (NAKS)

Overcurrent (NAKS)

Overdraft Charge - Banking (AD)