How Do ATMs Work?

ATM machines are some of the most useful technologies today, and perhaps one of the most prominent that connects our digital world to the physical one. By simply putting in your card you can instantly get cold hard cash from your bank account, but how is that even possible?

We've all used an ATM: After you input your card into an ATM, you then input a PIN to ensure proper security measures, then you're met with prompts for how and how much money you want to extract. Once the entire process is approved by the bank, you get your money out.

In essence, an ATM machine is a computer that has a mechanical dispenser for cash. Notably, that computer is connected to a secure network that can link up and validate information with your bank account. So what all goes into this giant computer that dispenses cash?

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