| OCS | Overseas Courier Service | 欧西爱斯国际快递有限公司 |
| OCS | Officer Candidate School | (美国)候补军官学校 |
| OCS | Operational Control System | 操作控制系统 |
| OCS | Optical Communication System | 光通讯系统 |
| OCS | Obstacle Clearance Surface | 超障面 |
| OCS | On-off Control System | 开关量控制系统 |
| OCS | Office Communications Server (Microsoft) | Office Communications Server(Microsoft) |
| OCS | Office of Cancer Survivorship (National Cancer Institute) | 癌症幸存者办公室(国家癌症研究所) |
| OCS | Orthopedic Clinical Specialist | 骨科临床专家 |
| OCS | Office of Cyberspace Security (US White House) | 网络空间安全办公室(美国白宫) |
| OCS | Optimum Class Size | 最佳班级大小 |
| OCS | Office of Career Services | 职业服务办公室 |
| OCS | Oracle Collaboration Suite | 协作套件 |
| OCS | Online Customer Service | 在线客户服务 |
| OCS | Oil Company of Spain, SA | 西班牙石油公司 |
| OCS | Outer Continental Shelf | 外大陆架 |
| OCS | Ophthalmic Coding Specialist | 眼科编码专家 |
| OCS | Order Control System | 订单控制系统 |
| OCS | Office of Communication Systems | 通信系统办公室 |
| OCS | Occupation Control System (railway) | 占用控制系统(铁路) |
| OCS | Operational Capability Demonstration | 作战能力演示 |
| OCS | On Course Side (sailboat racing) | 在球场一侧(帆船比赛) |
| OCS | Office of the Corporate Secretary (Canada) | 公司秘书办公室(加拿大) |
| OCS | Oklahoma Climatological Survey | 俄克拉荷马州气候调查 |
| OCS | Outstation Communication Subsystem | 外部通信子系统 |
| OCS | Offering Circular Supplement (bond drafting document) | 发行通函补充(债券起草文件) |
| OCS | Ocean Colour Scene (band) | 海洋色彩场景(乐队) |
| OCS | Orange County Speaker (Garden Grove, CA) | 奥兰治县议长(加利福尼亚州加登格罗夫) |
| OCS | Oregon Cascade Symphony | 俄勒冈州级联交响乐团 |
| OCS | Optical Channel States (Lucent) | 光信道状态(Lucent) |
| OCS | Open Content Syndication (XML format) | 开放内容联合(XML格式) |
| OCS | On-Card Sequencer | 卡上音序器 |
| OCS | On-Line Comparison System | 在线比较系统 |
| OCS | Ocean Color Scanner | 海洋彩色扫描仪 |
| OCS | Operation and Control Simulator | 操作和控制模拟器 |
| OCS | Optical Control System | 光学控制系统 |
| OCS | Officer Conducting the Serial | 演习总导演 |
| OCS | Offensive Counterspace | 攻击性空防 |
| OCS | Osteopathic Clinical Skills | 骨病临床技巧 |
| OCS | Outbound Contact Solution | 出站联系人解决方案 |
| OCS | One Complete Solution | 一个完整的解决方案 |
| OCS | Offshore Constitutional Settlement (Australia) | 离岸宪政解决方案(澳大利亚) |
| OCS | Other Cool Stuff | 其他酷东西 |
| OCS | Original Chipset (Commodore Amiga computers) | 原始芯片组(Commodore Amiga计算机) |
| OCS | Output Control Software | 输出控制软件 |
| OCS | Oxygen Cost Score | 氧气成本分数 |
| OCS | On Campus Session | 校内课程 |
| OCS | Optical Calibration Sphere | 光学校准球 |
| OCS | organic confusionai syndrome | 器质性混淆综合征 |
| OCS | Office of the Chief Scientist | 首席科学家办公室 |
| OCS | ovine chorionic somatomam motropin | 绵羊绒毛膜促生长激素 |
| OCS | Operator Communications Software | 操作员通信软件 |
| OCS | oral contraceptive steroid | 口服避孕药类固醇 |
| OCS | open canalicular system | 明渠系统 |
| OCS | Optical Convergence Switch | 光会聚开关 |
| OCS | Officers' Candidate School | 学校官员的候选人 |
| OCS | Oxford Conception Study | 牛津概念研究 |
| OCS | Operation Clean Sweep | 操作清洁清扫 |
| OCS | Overnight Comparison System | 过夜比较系统 |
| OCS | Open Content Syndication | 开放内容联合 |
| OCS | Overhead Contact System | 架空接触网 |
| OCS | Onboard Computer System (Russian) | 车载计算机系统(俄语) |
| OCS | Orthogonal Curvilinear Coordinate System | 正交曲线坐标系 |
| OCS | Orbit Circularization System | 轨道循环系统 |
| OCS | Orbit Control Subsystem | 轨道控制子系统 |
| OCS | Optical Control Subsystem | 光学控制子系统 |
| OCS | Openconnect Systems | Openconnect系统 |
| OCS | Operator Control Station | 操作员控制站 |
| OCS | Overhead Catenary/Collector System (transit) | 接触网/采集系统(交通) |
| OCS | Oceanic Control System (air traffic management system used by Airways Corporation of New Zealand Ltd) | 海洋控制系统(新西兰航空公司使用的空中交通管理系统) |
| OCS | Originating Call Screening | 发起呼叫筛选 |
| OCS | Occupant Classification System | 乘员分类系统 |
| OCS | Overload Control Subsystem | 过载控制子系统 |
| OCS | Officer Cadet School | 军官学员学校 |
| OCS | Optical Character Scanner | 光学字符扫描仪 |
| OCS | Obstacle Clearance Surface (aviation) | 障碍物清除表面(航空) |
| OCS | Ordinary Common Sense | 普通常识 |
| OCS | Office of Community Services | 社会服务处 |
| OCS | Office on Contract Settlement | 合同结算办公室 |
| OCS | Off-Campus Student | 校外学生 |
| OCS | Optical Crossconnect System | 光交叉连接系统 |
| OCS | Order Communication System | 订单通信系统 |
| OCS | Office of Coast Survey | 海岸调查局 |
| OCS | Oral Corticosteroids | 口服皮质类固醇 |
| OCS | Obsessive-Compulsive Syndrome | 强迫症综合征 |
| OCS | Office of Children's Services (Alaska) | 办公室的儿童服务(阿拉斯加) |
| OCS | Office of Compensatory Services (Special Education, Baltimore City Public School System) | 补偿服务办公室(特殊教育,巴尔的摩市公立学校系统) |
| OCS | Ojemann Cortical Stimulator (Integra) | 奥杰曼皮层刺激仪(Integra) |
| OCS | On Campus Suspension | 校园内暂停 |
| OCS | On the Course Side (sailing, starting line) | 在球场一侧(帆船、起跑线) |
| OCS | Ordinary Circular Slot | 普通圆形槽 |
| OCS | Old Church Slavonic (extinct liturgical language; aka Old Church Slavic) | 古教会斯拉夫语(已灭绝的礼仪语言;又名古教会斯拉夫语) |
| OCS | On Company Service | 公司服务 |
| OCS | Old Chipset (Commodore Amiga computers) | 旧芯片组(Commodore Amiga计算机) |
| OCS | Overseas Citizens Service | 海外公民服务 |
| OCS | Office of the Chief of Staff (US Army) | 参谋长办公室(美国陆军) |
| OCS | Operational Case Study | 运营案例研究 |
| OCS | One-Cylindrical Stack (capacitor with high dielectric constant) | 一个圆柱形堆叠(具有高介电常数的电容器) |
| OCS | Orange County Supertones (band) | 奥兰治县超级音(乐队) |
| OCS | Operations Communications System | 运营通信系统 |