| OTC | Organization for Trade Cooperation | 贸易合作组织 |
| OTC | Office of Transport and Communications | 交通运输处 |
| OTC | Officers'Training Corps | 军官训练团 |
| OTC | Overseas Telecommunications Commission | 海外电信委员会 |
| OTC | Over-the-counter | 柜台市场 |
| OTC | open to custom | 分处方药 |
| OTC | Officer in Tactical Command | 战术指挥官 |
| OTC | Office of Technical Cooperation | 技术合作处 |
| OTC | Oxytetracycline | 氧四环素,土霉素 |
| OTC | Ohio Turnpike Commission | 俄亥俄州收费公路委员会 |
| OTC | Over The Counter (medications not requiring a prescription) | 柜台服务(不需要处方的药物) |
| OTC | Over The Counter (stocks) | 柜台(股票) |
| OTC | Organ Transplant Center | 器官移植中心 |
| OTC | Officers'Training Corps | 军官训练团 |
| OTC | Ogemaw Telephone Company (Michigan) | Ogemaw电话公司(密歇根州) |
| OTC | Over The Counter | 场外交易 |
| OTC | Operating Telephone Company | 运营电话公司 |
| OTC | Order to Show Cause (civil law) | 表明理由的命令(民法) |
| OTC | Off The Clock | 下班时间 |
| OTC | Out to Court | 出庭受审 |
| OTC | Organic Toxic Compound | 有机有毒化合物 |
| OTC | Office Technology Center | 办公技术中心 |
| OTC | Orlando Tech Center (Florida) | 奥兰多技术中心(佛罗里达州) |
| OTC | Olivos Tenis Club | 奥利沃斯男高音俱乐部 |
| OTC | Oriental Timber Company | 东方木材公司 |
| OTC | Operational Training Capability | 作战训练能力 |
| OTC | Ouaticha Technical College (Malvern, Arkansas) | 瓦蒂察技术学院(阿肯色州马尔文) |
| OTC | Ontario Teacher's Certificate (Canada) | 安大略教师证书(加拿大) |
| OTC | One Time Cost | 一次性成本 |
| OTC | Offsite Training Center | 场外培训中心 |
| OTC | Office des Transports du Canada (Canadian Transportation Agency) | 加拿大交通局 |
| OTC | Ozarks Technical Community College (Springfield, MO) | 奥扎克技术社区学院(密苏里州斯普林菲尔德) |
| OTC | Oxytetracycline (calcium complex) | 土霉素(钙络合物) |
| OTC | Output Technology Corporation | 输出技术公司 |
| OTC | On-Scene Tactical Commander | 现场战术指挥官 |
| OTC | Olivia Tremor Control (band) | Olivia Tremor Control(乐队) |
| OTC | Okefenokee Technical College | Okefenokee技术学院 |
| OTC | Office of Tobacco Control (Ireland) | 烟草控制办公室(爱尔兰) |
| OTC | Ordnance Training Command | 军械训练司令部 |
| OTC | Off Topic Comments | 非主题评论 |
| OTC | On The Clock | 在时钟上 |
| OTC | OnTrack Consulting | OnTrack咨询 |
| OTC | Operational Test Command | 运行测试命令 |
| OTC | Owatonna Tool Company | 奥瓦通纳工具公司 |
| OTC | Original Trilogy Collection | 原创三部曲集 |
| OTC | Offender Time Computation | 罪犯时间计算 |
| OTC | Officers Training Conference | 军官培训会议 |
| OTC | Ornithine Transcarbamylase | 鸟氨酸转氨基淀粉酶 |
| OTC | Oriental Trading Company | 东方贸易公司 |
| OTC | Ozone Transport Commission | 臭氧传输委员会 |
| OTC | Offshore Technology Conference | 海上技术会议 |
| OTC | On Tape Catalog | 磁带上目录 |
| OTC | Ornithine Carbamoyltransferase | 鸟氨酸氨基转移酶 |
| OTC | Officer Training Corps | 军官训练团 |
| OTC | On The Contrary | 相反地 |
| OTC | Olympic Training Center | 奥林匹克训练中心 |
| OTC | Object Technology Center (Conference) | 对象技术中心(会议) |
| OTC | Online Technology Consortium | 在线技术联盟 |
| OTC | On Target Commission | 关于目标佣金 |
| OTC | Order To Cash | 订单到现金 |
| OTC | One-Time Charge | 一次性充电 |
| OTC | Operational Test Coordinator (US Navy) | 作战测试协调员(美国海军) |
| OTC | Online Travel Company | 在线旅游公司 |
| OTC | Outsourcing Technology and Commercial (legal department) | 外包技术和商业(法律部门) |
| OTC | On the Chip | 芯片上 |
| OTC | Operational Test Command (US Army; formerly Test and Experimentation Command) | 作战测试司令部(美国陆军;前身为测试和实验司令部) |
| OTC | Ottawa Torah Center | 渥太华托拉中心 |
| OTC | Owatonna Tool Company (Owatonna, MI) | 奥瓦通纳工具公司(密歇根州奥瓦通娜) |
| OTC | Off the Chart (radio) | 图表外(收音机) |
| OTC | over-the-counter contraceptive | 非处方避孕药 |
| OTC | over-the-counter(not prescribed)drug | 非处方药 |
| OTC | Old Timers Club | 老时光俱乐部 |
| OTC | oval target cell | 椭圆形靶细胞 |
| OTC | Oregon Transportation Commission | 俄勒冈州交通委员会 |
| OTC | Oklahoma Tax Commission | 俄克拉荷马州税务委员会 |
| OTC | Ottawa Tool Company | 渥太华工具公司 |
| OTC | Other Than Collision (insurance term meaning comprehensive coverage) | 碰撞除外(保险术语指综合保险) |
| OTC | Open Tubular Column | 开放式管柱 |
| OTC | Open Technology Centre (UK) | 开放技术中心(英国) |
| OTC | Out of The Closet | 走出壁橱 |
| OTC | Occupational Training Center | 职业培训中心 |
| OTC | Other Than Clinton | 克林顿以外的人 |
| OTC | Online Teen Club | 在线青少年俱乐部 |
| OTC | Oh Those Clowns | 哦,那些小丑 |
| OTC | Optical Telephone Corporation | 光电话公司 |