| OTA | Occupational Therapists' Association | 职业疗法医生协会 |
| OTA | Office of Technology Assessment | 技术评价处 |
| OTA | Ontario Telecommunications Association | 安大略省电信协会 |
| OTA | Orthopaedic Trauma Association | 骨科创伤协会 |
| OTA | Occupational Therapists' Association | 职业疗法医生协会 |
| OTA | Orthodontic Technicians Association (UK) | 正畸技师协会(英国) |
| OTA | Organic Trade Association | 有机贸易协会 |
| OTA | Oil Technology Association | 石油技术协会 |
| OTA | Orthodontic Technicians Association | 正畸技师协会 |
| OTA | Ontario Trucking Association | 安大略省卡车运输协会 |
| OTA | Obedience Trials Association | 服从审判协会 |
| OTA | Oregon Telephone Association | 俄勒冈州电话协会 |
| OTA | Ontario Tennis Association | 安大略省网球协会 |
| OTA | Over-The-Air | 空中传送 |
| OTA | On-Time Arrival | 准时到达 |
| OTA | Occupational Therapy Assistant | 职业治疗助理 |
| OTA | Operational Transconductance Amplifier | 操作跨导放大器 |
| OTA | Office of Tax Analysis | 税务分析办公室 |
| OTA | Organized Team Activity | 有组织的团队活动 |
| OTA | Out of the Air (pricing methodology) | 空中传送(定价方法) |
| OTA | OpenTravel Alliance | OpenTravel联盟 |
| OTA | Online Travel Agent | 在线旅行社 |
| OTA | Oklahoma Technology Administrators | 俄克拉何马州技术管理员 |
| OTA | Oklahoma Turnpike Authority (Oklahoma City, OK) | 俄克拉荷马州收费公路管理局(俄克拉何马市,OK) |
| OTA | Oracle Training Administrator/Administration | 管理培训管理/神谕 |
| OTA | Operational Test Agency | 运行测试机构 |
| OTA | Ortho-Tolidine-Arsenite | 正托利丁砷酸盐 |
| OTA | Operational Test Authority | 运行测试机构 |
| OTA | Over The Air | 空中传送 |
| OTA | orthotoluidine arsenite test | 亚砷酸邻甲苯胺试验 |
| OTA | Occupational Therapist Assistant | 职业治疗师助理 |
| OTA | Operational Transistor Amplifier | 运算晶体管放大器 |
| OTA | One True Army | 一支真正的军队 |
| OTA | Ordered to Appear (legal courts) | 命令出庭(法律法庭) |
| OTA | Other Transactional Agreement | 其他交易协议 |
| OTA | Officer Traning Academy (of India) | 特宁警官学院(印度) |
| OTA | Mota, Ethiopia | 埃塞俄比亚莫塔 |
| OTA | Obligatory Thug Attack (gaming) | 强制重击攻击(游戏) |
| OTA | Oracle Transport Agent | Oracle传输代理 |
| OTA | Turkish, Ottoman (1500 - 1928) | 土耳其,奥斯曼帝国(1500-1928) |
| OTA | Open Tools Api | 打开工具Api |
| OTA | Open Travel Alliance | 开放旅行联盟 |
| OTA | One To All | 一对所有 |
| OTA | Office of Internal Administration | 内部管理办公室 |
| OTA | Offseason Training Activities (US Football) | 休赛期训练活动(美国足球) |
| OTA | Other Transactional Authority | 其他交易权限 |
| OTA | Over-The-Air Management | 空中管理 |
| OTA | Officer Training Allowance | 军官训练津贴 |
| OTA | Operational Transconductor Amplifier | 运算跨导放大器 |
| OTA | Office of Technical Assistance | 技术援助处 |
| OTA | Open to All | 向所有人开放 |
| OTA | Original Total Annihilation | 原始全歼 |
| OTA | Open to Air (wound dressing) | 露天(伤口敷料) |
| OTA | Older Than Average (student) | 年龄大于平均值(学生) |
| OTA | Ordnance Transmission Assembly | 军械传动组件 |
| OTA | Optical Telescope Assembly | 光学瞄准镜组件 |
| OTA | Oxford Text Archive (UK) | 牛津文本档案馆(英国) |
| OTA | Officer's Training Academy (India) | 军官培训学院(印度) |
| OTA | Orchard Training Area | 果园训练区 |
| OTA | Optical Tube Assembly (telescopes) | 光学管组件(望远镜) |
| OTA | Office of Territorial Affairs | 领土事务办公室 |
| OTA | Optical Transition Amplitude | 光学跃迁幅度 |