Eventually at some level commands will have to be converted into something a non-sentient device can respond to. My understanding is that computers are essentially a big network of switches. So how is machine code (I think basically a file containing bits of information representing a series of on-off signals) turned into a physical response within the computer? I guess you could ask the same thing about human brains, but since we have actually built these things I'm guessing we also know how they work. Thanks.