μC/OS-II是一种可移植的，可植入ROM的，可裁剪的，抢占式的，实时多任务操作系统内核。它被广泛应用于微处理器、微控制器和数字信号处理器。

μC/OS 和μC/OS-II 是专门为计算机的嵌入式应用设计的， 绝大部分代码是用C语言编写的。CPU 硬件相关部分是用汇编语言编写的、总量约200行的汇编语言部分被压缩到最低限度，为的是便于移植到任何一种其它的CPU 上。用户只要有标准的ANSI 的C交叉编译器，有汇编器、连接器等软件工具，就可以将μC/OS-II嵌入到开发的产品中。μC/OS-II 具有执行效率高、占用空间小、实时性能优良和可扩展性强等特点， 最小内核可编译至 2KB 。μC/OS-II 已经移植到了几乎所有知名的CPU 上。-μC/OS and μC/OS-II is designed for embedded applications, computer design, most of the code is written in C language. CPU hardware-related part is written in assembly language, total of about 200 lines of assembly language portion is compressed to a minimum, in order to facilitate the migration to any other CPU. User as long as standard ANSI C cross compiler, assembler, linker and other software tools, you can μC/OS-II embedded development products. μC/OS-II with the implementation of high efficiency, small footprint, real-time with excellent performance and scalability features, the smallest kernel can be compiled to 2KB. μC/OS-II has been ported to almost all known CPU.