Op Amps
Op Amps have taught me a very interesting concept. The concept that negative feedback can be very good. Negative feedback is used to control, stabilize and control the output. Mainly its useful because the op amp has such a high gain. In our society there is always negative feedback and we consider them mostly harmful and not great thing to have. But it seems like there can be systems that can be very good with negative feedback. It can be used to control spread of information and diffusion.
