jos
Abbr 交沙霉素；怡和科技

For JOS, however, we will use the conventional hard drive boot mechanism, which means that our boot loader must fit into a measly 512 bytes.
不过对于JOS，我们将使用传统的硬盘驱动器启动机制，这意味着我们的启动引导程序必须符合那微不足道的512字节。;