| OFA | Optical Fiber Amplifier | 光纤放大器 |
| OFA | Ontario Forestry Association (Canada) | 安大略省林业协会（加拿大） |
| OFA | Oklahoma Forestry Association | 俄克拉荷马州林业协会 |
| OFA | Ontario Film Association (Canada) | 安大略省电影协会（加拿大） |
| OFA | Old Fortunates Association | 旧幸运协会 |
| OFA | Oxygenated Fuels Association | 氧化燃料协会 |
| OFA | Ontario Fencing Association | 安大略省击剑协会 |
| OFA | Ohio Florists Association | 俄亥俄州花卉协会 |
| OFA | Orthopedic Foundation for Animals | 国际骨科动物基金会 |
| OFA | Office of Flight Assurance | 飞行保证办公室 |
| OFA | Online Forward Auction | 在线远期拍卖 |
| OFA | Obstacle Free Area (airfield term) | 无障碍区（机场术语） |
| OFA | Operation Foxhole Atheists | 狐狸洞无神论者行动 |
| OFA | Optimal Flexible Architecture | 最佳灵活架构 |
| OFA | Office of Family Assistance | 家庭援助办公室 |
| OFA | Oracle Flexible Architecture | Oracle灵活的体系结构 |
| OFA | Operational Field Assessment | 作战现场评估 |
| OFA | Orphan Foundation of America | 美国孤儿基金会 |
| OFA | Ontario Federation of Agriculture | 安省农业联盟 |
| OFA | Other Federal Agencies | 其他联邦机构 |
| OFA | Organization of Flying Adjusters | 飞行调节员组织 |
| OFA | Office for the Aging | 老龄办公室 |
| OFA | Opportunity for Advancement (Toronto, Canada) | 晋升机会（加拿大多伦多） |
| OFA | Office of Federal Activities | 联邦活动办公室 |
| OFA | Office of Finance and Administration | 财务和行政办公室 |
| OFA | Oracle File Architecture | Oracle文件体系结构 |
| OFA | One For All | 一对所有人 |
| OFA | Office of Fiscal Administration | 财政管理办公室 |
| OFA | Osteochondrosis Foundation for Animals | 动物骨软骨病基金会 |
| OFA | oncofetal antigen | 癌胚抗原 |
| OFA | Orthopedic Foundation of America | 美国骨科基金会 |
| OFA | Oracle Financial Analyzer | Oracle财务分析器 |
| OFA | Onafhankelijke Fanclub Ajax | Onafhankelije Fanclub阿贾克斯 |
| OFA | Order for Arrest | 逮捕令 |
| OFA | Over Fire Air | 过火空气 |
| OFA | Office of Financial Assistance | 财政援助办公室 |
| OFA | Order for Arrest (criminal justice) | 逮捕令（刑事司法） |
| OFA | Occupational First Aid | 职业急救 |
| OFA | Out Fooling Around | 外出闲逛 |
| OFA | Orthogonal Field Alternation | 正交场交替 |
| OFA | Object Free Area | 无对象区域 |
| OFA | Office of Finance and Administration (DOC/NOAA) | 办公室的财务、行政(医生/ NOAA) |
| OFA | Old Farmers Almanac | 老农民年鉴 |