In the context of computer programming and object-oriented programming, an "amount of material" is often referred to as a "quantity" or "amount" when talking about objects. An object can have various properties, attributes, or characteristics, and one of these could be the quantity or amount of material it represents or holds. For example, if you have an object representing a physical item like a book, the quantity might refer to the number of pages or the amount of paper used to create it. Similarly, in a game, an object representing an item or resource could have a quantity indicating how many units of that item the player possesses.