OOP is a way of programming that involves breaking our requirements down into chunks that are more manageable than the whole.

Each chunk is self-contained yet potentially reusable by other programs while working together as a whole with the other chunks.

These chunks are what we have been referring to as objects. When we plan an object, we do so with a class. A class can be thought of as the blueprint of an object.

We implement an object of a class. This is called an instance of a class. Think about a house blueprint. You can't live in it, but you can build a house from it, which means you build an instance of it. However, OOP is more than this. It is also a methodology that defines best practices such as the following: