ooo(One of Us，自己人)是一个内部人员认证系统，具有账号创建、认证、更新的功能，并提供Web Service API提供账号认证功能，可以应用于单点登录、权限控制等使用场景。  ooo(One of Us) is an authentication system for staffs in an organization. It has basic account adminstration functions, such as creation, authentication and updating. It offers Web Service APIs for account authentication, which can be applied in SSO(single sign-on), authorization, and so on.