初始化程序加载：
Initial program load (IPL) is a mainframe term for loading the operating system’s kernel
into the computer’s main memory. On a personal computer, booting into the operating
system is the equivalent to IPLing. This activity takes place to prepare the computer for
user operation.
into the computer’s main memory. On a personal computer, booting into the operating
system is the equivalent to IPLing. This activity takes place to prepare the computer for
user operation.
