特点是能运行在各种不同类型强大的微处理器上；具有强大的通用型操作系统的功能，如具备了文件和目录管理、多任务、设备支持、网络支持、图形窗口以及用户界面等功能；具有大量的丰富的应用程序接口（API）和嵌入式应用软件丰富。-Feature is able to run on a variety of different types of powerful microprocessors　a powerful general-purpose operating system features such as file and directory management with a multi-task, device support, network support, graphics and user interface features such as window　 with a large number of rich application programming interface (API) and software-rich embedded applications.