Object Oriented Design is a programming paradigm based on the concept of "objects", which can contain data and code. Data in the form of fields (attributes), and code, in the form of procedures (methods). Coursera's Object Oriented Design catalogue teaches you the principles and methodologies to design software systems using object-oriented techniques. You'll learn about fundamental concepts such as abstraction, encapsulation, inheritance, and polymorphism, how to design classes, interfaces, and relationships between objects, and the application of design patterns to solve complex problems. This skill is crucial for software engineers, programmers, and anyone seeking to create efficient, modular, and scalable software systems.