# Day 8

## 结语

到这里，我们对操作系统的概念有了比较直观的理解。但这仅仅是一个开始。实际的操作系统内核功能还会多很多，并且代码需要精简复用，而不是像现在这样，只是简单堆叠。

限于时间和精力，我们并没有继续开发和研究下去，但以后说不定会继续......

```
OS is a complex system;putting a programming layer on top of the API doesn't eliminate the complexity - it merely hides it. Sonner or later that complexity is going to jump out and bite you in the leg.
```