| ORA | O'Reilly Automotive 
| Others |
| ORA | Oatmeal Red Ale
| Others |
| ORA | Oberhof Ruhpolding and Antholz
| Others |
| ORA | Object Relational Access
| Others |
| ORA | Oceans Reefs And Aquariums
| Others |
| ORA | Oceans Reefs Aquariums
| Others |
| ORA | Off Road Academy
| Others |
| ORA | Off Road Action
| Others |
| ORA | Off Road Addict
| Others |
| ORA | Off Road Adventures
| Others |
| ORA | Off Road Armoury
| Others |
| ORA | Off Road Assist
| Others |
| ORA | Off Road Awards
| Others |
| ORA | Off Roaders Anonymous
| Others |
| ORA | Office of Regulatory Affairs
| Others |
| ORA | Office of Research Affairs
| Others |
| ORA | Office of Research and Applications
| Others |
| ORA | Office Of Resource Assistance
| Others |
| ORA | Offroad Riders Association
| Others |
| ORA | Offshore Risk Assessment
| Others |
| ORA | Ohio Restaurant Association
| Others |
| ORA | Oil Recycling Association
| Others |
| ORA | On Road Assistance
| Others |
| ORA | Online Recruitment Application
| Employment, Software |
| ORA | Online Retail Awards
| Others |
| ORA | Ontario Racing Association
| Others |
| ORA | Ontario Rifle Association
| Others |
| ORA | Open Records Act
| Others |
| ORA | Operational Readiness Assessment
| Others |
| ORA | Operational Requirements Analysis
| Others |
| ORA | Operations Research Analyst
| Others |
| ORA | Optical Research Associates
| Others |
| ORA | Optimized Runtime And Airflow
| Others |
| ORA | Optiwave Refractive Analysis
| Others |
| ORA | or with Accumulator
| Others |
| ORA | Oracle
| Others |
| ORA | Oral Research Abstracts
| Others |
| ORA | Oramiral
| Others |
| ORA | Oran, Santa Ana, Argentina
| Others |
| ORA | Organization for the Resolution of Agunot
| Others |
| ORA | Organization Risk Analyzer
| Others |
| ORA | Organizational Registration Authority
| Others |
| ORA | Organizational Research Analyst
| Others |
| ORA | Ormet Railroad
| Others |
| ORA | Ormet Railroad Corporation
| Others |
| ORA | Orphans Refugees And Aid
| Others |
| ORA | Oscillator Rectifier and Amplifier
| Others |
| ORA | Oscillator, Rectifier, and Amplifier
| Others |
| ORA | Outdoor Refreshment Area
| Others |
| ORA | Outdoor Resorts of America
| Others |
| ORA | Outer Rhabdomeres Absent
| Others |
| ORA | Output Register A
| Others |
| ORA | Owen Richards Architects
| Others |
| ORA | Parameter file (Oracle)
| Others |