EPICS is composed by three parts which are OPI (Operator Interface) that runs on client and IOC (In/Output Controller) that runs on server and CA (Channel Access).

• EPICS由三部分组成，即运行在客户端的操作员接口模块OPI(Operator Interface)、运行在服务器端的输入输出控制模块IOC(Input Output Controller)和网络通讯模块CA(Channel Access)。