nubtastic question

Hey sup?
I'm relatively to new to C programming or programming of anykind for that matter. I was just wondering thoguht, hiw dies a piece of hardware get controlled by a piece of software. For example how do the programs work in microcontrollers that are in microwaves or radios or anything, or how does a digital scale work? Are these programs simple or what? Just really curious... :confused:

You might want to try doing a google search on keywords like: firmware development tutorial