The acronym OOP stands for Object-Oriented Programming. This programming paradigm is centered around the concept of objects, which encapsulate data and the methods that operate on that data. OOP promotes reusability through inheritance, allowing new classes to inherit properties and behaviors from existing classes. It also enhances flexibility and maintainability by organizing code into manageable parts. This approach is widely used in software development for building complex applications, making it easier to design, implement, and maintain codebases over time.