For example, you can read a book, and you can flip its pages. You can look at the title, find a specific chapter, look something up in the index, count the number of pages, and so on. However, there are actions that are generic to all physical objects, such as picking them up. That is, you will create general object classes and then make more specific classes from them, deriving the particular from the general. Let's look at a quick example to see what all of these words actually mean.
All objects have a location on the screen.
They might also have a color. These attributes are possessed by every shape shown on the screen. For example, in C you could create a base structure that holds the object's location on the screen and color. Then specific object structures could include this base structure and add to it. That all may sound like gibberish now, but as you become familiar with the concepts and vocabulary you will begin to see the power of these new techniques.