一个电信运营计费系统，主要实现了资费管理，管理员管理，权限管理等模块-A carrier billing system, the main implementation of the management fee, the administrator management, rights management module, etc.

学习软件工程导论，必要的知识需求书籍，让我们从思维上学习到，软件工程导论的思想。-Introduction to learning software engineering, the necessary demand for books of knowledge, let us learn the mind, an introduction to the software engineering thinking.