The research and development of domestic embedded operating systems is very hot, and related testing work is increasingly attached to industry insiders! Here you can see the topic of these aspects: the design principle and practice of operating system, develop embedded OS common programming language communication, embedded OS system and its application software test, 3G Times Intelligent Terminal OS Selection The research and development of application software, the occupational planning and development direction of software practitioners, IT people's health protection common sense, etc. In case of improper, everyone is welcome, I am grateful!