Here's something to stop and think about...

I have a TomTom One. It's a small, hand-held device with a set of road 
maps of the whole of the UK stored in flash RAM.

I have no idea what kind of CPU powers this device, but what I can tell 
you is this: When I ask it to plot a route, it can seemingly analyst 
tens of thousands of roads and quickly find a suitable route. (Typically 
takes less than 10 seconds.)

That doesn't *sound* very impressive... until you sit down and try to 
think of a way to program such a thing yourself. How would you do that??

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