说明：  RTEMS的全称是"实时导弹控制执行体"。现在RTEMS的全称是 "多处理器实时操作系统",是一个纯粹的32位系统（由于充分利用了32位的特性，所以无法像uCOSII那样用于低端的8位系统）。
(RTEMS stands for " real-time control of the implementation of the missile body." Now RTEMS stands for " multi-processor real-time operating system" is a pure 32-bit system (due to take full advantage of the 32 properties, it is not possible for the low-end as uCOSII as 8-bit system).)