A real-life example of modules
Let's consider a familiar modular system. You are most likely reading this book in a place that has electricity and there are many electric outlets in the walls surrounding you. This system enables you to plug in various electrical devices into the outlets and each one of these devices is designed to do a very specific task.
Consider the electrical devices that are plugged into some of these outlets: microwaves, electric kettles, washers, dryers, and so on.
None of these devices care if they are plugged into the electrical outlet in your house or your neighbor's house. They are designed to do their specific task and functionality when they are plugged in and when the power is on, regardless of whose house they are ...
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