How do computers work? Yes, that appliance you use every day? To help answer the question, Code.org (a non-profit dedicated to expanding access to computer science) has put together a collection of primers that explain some of the oft-discussed components of computers--circuits, memory, CPU, etc. And how they all fit together.
The first video starts off with an introduction by Bill Gates. Watch the remaining five videos (each about five minutes long) just by letting the playlist run above. Or see this video collection on YouTube.