Video: How ATMs Work

We use them everyday. ATMs. These cash machines were once luxuries but now today we rely on automatic teller machines for both convenience and cash in emergencies.

But have you ever stopped to think how they work? Wonder what the inside of an ATM looks like? Find out answers to all of your questions in this video from HowStuffWorks.com.

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Video: How Air Conditioners Work

The summer months come and the thermometer pops up and you reach for your nearest air conditioner.

Your AC can also be the bane of your existence each time you open your electric bill and a moment ago you were all cool but now you are hot under the collar for what you have to pay. That's particularly true in states, such as Maryland, which have experienced a sharp rise in electricity prices.

You may or may not stay cool but at least with this video now you can know what's going on, thanks to HowStuffWorks.com.

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Video: How Do Computer Viruses Work?

Anyone who uses a computer lives in fear of them everyday: computer viruses. We look to buy the best virus protection software to protect us -- and keep it updated to safeguard our data and our work.

But exactly is a computer virus? And how does it work?

Find out now in this exclusive video from HowStuffWorks.com:

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