The Control Unit is responsible for selecting the right registers to pass in as inputs, and configuring the ALU to perform the right operation.

控制单元负责选择正确的寄存器作为输入传递，并配置 ALU 以执行正确的操作。

Programming was done by plugging hundreds of wires into plugboards, sort of like old school telephone switchboards, in order to set up the computer to perform the right operations.

编程方法是把几百根电线插到插板里，有点像老电话交换机，这样计算机才会执行正确的操作。