Perhaps the most critical principle to follow while designing an embedded system is that what you are designing is not a computer, even though its interface might be dominated by a computer-like bitmap display.

• 如果你设计的不是计算机，而是嵌入系统，那么这差不多是设计时要遵守的最重要的一条原则，即便它有像计算机一样的显示器。