Computers: What's inside "the magic box?"

I'm sure there are a large amount of people who use computers on a regular, day to day basis. I'm also sure that probably 90% of those users have never looked inside their computer. What makes a computer so intimidating? Why are we afraid to glance inside "the magic box?"

I think the reason most users would give for not opening it is because they wouldn't want to damage their computer and this is a reasonable concern, but unless they are replacing their processor or changing the power supply; damaging the computer is unlikely.

Everyday users should regularly open the computer, simply to dust it out. If dust is left in a computer for too long it can clog the fans, and cause the computer to overheat, which can cause some serious damage. A computer should be dusted regularly, perhaps once every month or every two months depending on usage level, or maybe do it everytime you dust the house. Compressed air cans get the job done just fine.

Don't be a shy user, take a look in the box. You may be surprised at how it looks at first, but get familiar with your computer, understand it's specifications so that; should a problem ever arise, you can provide the details of your computer to whoever's helping you so they can locate the problem with greater ease.