| Composites Design and Manufacture (Plymouth University teaching support materials) Abbreviations and acronyms (including research projects/thematic networks). |
| O | Explanation | Location/Reference/Context as appropriate |
| -O | suffix indicating O-group rubbers | polymer chain contains C and O (eg CO, ECO and GPO) |
| OA | Open Access | JISC page |
| OACA | 2-Octyl Amino-4,6-diChloro-s-triAzine | |
| OACM | Off-Axis Composite Material | |
| OAN | Open Access Nest | |
| OAPEN | Open Access Publishing in European Networks Foundation | |
| OAS | Oxford Advanced Surfaces | adhesion promoters |
| OATMEAL | Out-of-autoclave Amorphous/semicrystalline Thermoplastic Material for Energy-efficient Aerospace grade Laminates | |
| OBM | Original Brand Manufacturer | |
| OBOR | One Belt, One Road | OBOR = MSR (Maritime Silk Road) + SREB (Silk Road Economic Belt) |
| OCAMAC | Oxford Centre for Advanced Materials and Composites | University of Oxford |
| OCC | Old Corrugated Cardboard fibers | |
| OCCA | Oil & Colour Chemists' Association | |
| OCCS | onboard carbon capture and storage | in the context of fossil-fuel based shipping |
| OCEAN | Ocean Community Empowerment and Nature | Defra |
| OCM | (conference) Organising Committee Member | |
| OCMC | Oxide Ceramic Matrix Composite | |
| OCMI | Officers in Charge: Marine Inspection | |
| OCP | Open Circuit Potential (Voltage) | |
| OCT | Optical Coherence Tomography | |
| OCT | Over-height Compact Tension specimen | |
| OD | Optical Density | |
| OD | Ozone Depletion | |
| ODA | Official Development Assistance | |
| ODFC | Oriented Discontinuous Fibre Composites | |
| ODIM | Operational Data Integrated Method | |
| ODLS | Operational Dynamic Load Sequence | |
| ODM | Original Design Manufacturer | |
| ODP | Ozone Depletion Potential (EICF) | |
| ODPM | Office of the Deputy Prime Minister | London - United Kingdom |
| ODS | Operating Deflection Shape | |
| ODS | Oxide Dispersion Strengthened Alloys | |
| ODYL | Ocean Discovery Yachts Limited | |
| OE | Open-ended (spinning systems) | |
| OECD | Organization for Economic Cooperation and Development | Paris - France |
| OED | Orthogonal Experimental Design | |
| OEL | Occupational Exposure Limits | |
| OEM | Original Equipment Manufacturer | |
| OEP | Office for Environmental Protection | |
| OER | Oxygen Evolution Reaction | |
| OES | Optical Emission Spectroscopy | |
| OFBG | Optical Fibre Bragg Grating | |
| OFDR | Optical Frequency Domain Reflectometry | Technique for interrogating optical fibre sensors |
| OFET | organic field-effect transistor | |
| OFI | Optical Fibre Interferomeeter | |
| OFM | OpenFlexure Microscope | |
| OfQual | Office of Qualifications and Examinations Regulation | |
| OFR | Optical Fibre Refractometer | |
| OfS | Office for Students | |
| OFS | Optical Fibre Sensor | |
| OFS | Optical Fibre Spectroscopy | |
| OGEE | Oil and Gas Exploration and Exploitation | |
| OGPM | Oil and Gas Profits Mechanism | |
| OH | Occupational Health | |
| OH | One Health | an integrated, unifying approach to sustainably balance and optimise the health of people, animals and ecosystems. |
| OHC | Open Hole Compression | |
| OHP | Outer Helmholtz Plane | |
| OHSA | Occupational Health and Safety Administration | |
| OHT | Open Hole Tension | |
| OIT | Oxidation/Oxidative Induction Time | |
| OLED | Organic Light Emitting Diodes | |
| OLEV | Office for Low Emission Vehicles | |
| OLS | Ordinary Least Squares | A method used in linear regression to minimize the sum of squared residuals between the observed and predicted values. |
| OLT | Optical Lock-in Thermography | |
| OM | Optical Microscopy | |
| OMA | Operational Modal Analysis | |
| O-MAP | Open Materials acceleration Platforms | |
| OMB | Ozone with MicroBubbles | |
| OMC | Organic Matrix Composites | |
| OML | Outer/Outside Mould Line | |
| OMLS | Organo-Modified Layered Silicates | |
| OMS | Obsolescence Management Strategy | |
| OMSG | Operational Medical Support Group | |
| ONERA | Office National d’Etudes et de Recherches Aeronautiques | |
| ONR | Office of Naval Research | |
| ONS | Office for National Statistics | |
| OOA | Out-of-Autoclave | |
| OOD | Out-Of-Distribution | |
| OOF | Object-Oriented Finite element analysis | |
| OoM | Orders of Magnitude | |
| OOO | Out-of-Oven | |
| OOT | Oxidation Onset Temperature | |
| OOW | Out-of-Water (composite repair) | |
| OPB | One Piece Barrel composite fuselage | Alenia Aermacchi |
| OPEC | Organization of the Petroleum Exporting Countries | |
| OPEX | OPerating EXpenditure/EXperience | |
| OPAL | Occam Plausibility Algorithm for Surrogate | |
| OPF | Oil Palm Fibre composites | |
| OPF | Oil Palm Fronds | |
| OPFBF | Oil Palm Fruit Bunch Fibres | |
| OPI | Operational Performance Indicator | |
| OPIN | Ocean Power Innovation Network | |
| OPL | ISO Online Browsing Platform | |
| OPM | Online Process Monitoring | |
| OPM | Optical Polarising Microscope | |
| OPO | Optical Parametric Oscillators | |
| OPR | Open Peer Review | |
| OPTICOMS | Optimized Composite Structures | Clean Sky |
| OPTIMADE | Open Databases Integration for Materials Design | |
| O-PTIR | Optical-PhotoThermal IR spectroscopy | |
| OPV | Offshore Patrol Vessels | |
| OPW | One-Piece Woven | |
| OPWF | Oil Palm Wood Flour | |
| OQMD | Open Quantum Materials Database | |
| ORB | Organic Refuse Biocompound | Biohm mycelium product |
| ORCID | Open Researcher and Contributor IDs | |
| ORD | Open Research Data | |
| OREC | Offshore Renewable Energy Catapult | |
| OROC | Onshore Remote Operations Centre | |
| ORR | Office of Rail Regulation | London - United Kingdom |
| ORS | On-line Resin State | Synthesites |
| ORV | Oceanographic Research Vessels | |
| OSA | Optical Spectrum Analyser | |
| OSB | Oriented Strand Board | |
| OSCIBLEND | direct compounding/injection moulding | Wolfson Centre for Materials Processing (Brunel University) |
| OSEE | Optically Stimulated Electron Emission | |
| OSIP | Open Space Innovation Platform | |
| OS-IS | Overlapped and Staggered Interface Structure | |
| OSPL | Overall Sound Pressure Level | |
| OST | Office of Science and Technology | London - United Kingdom |
| OSU | Ohio State University | |
| OSV | Offshore Supply Vessel | |
| OSW | 'Open Space' Workshop | |
| OT | Polymer of bis-chloroalkylether with sulphur T-group rubber | |
| OT | Operational Technology | |
| OT | Optical Tweezers | |
| OTA | (2Z,4Z,6E)-octa-2,4,6-trienoic acid) | Clarissa Olivar et al in JACS 2024 |
| OTDR | Optical Time Domain Reflectometry | Technique for interrogating optical fibre sensors |
| OTFT | Organic Thin-Film Transistor | |
| OTMS | Octyl TriMethoxy Silane | |
| OTNR | Offshore Transmission Network Review | |
| OTOM | Optical Thermal Optimization Model | |
| OTP | One Time Passcode | |
| OTP | Optimal Transducer Placement | |
| OUPV | Operator of an Uninspected Passenger Vessel | |
| OVAAT | One Variable At A Time | |
| OVB | Oven Vacuum Bag | TD Juska et al in SAMPE Journal, 2009, 45(4), 22-36. |
| OVPOSS | Octavinyl cage-type Polyhedral Oligomeric SilSesquioxane | |
| OWC | Oscillating Water Column | |
| OWF | Offshore Wind Farm | |
| OWIH | Offshore Wind Innovation Hub | |
| OWIX | Offshore Wind Innovation Exchange | |
| OWL | Web Ontology Language | A language used for defining and instantiating ontologies in the semantic web. |
| OWRK | Owens, Wendt, Rabel, Kaelble method | surface free energy |