Object Oriented Programming Language (OOP) is a programming paradigm that uses objects to represent real-world entities such as people, places, and things, and their interactions. OOP languages allow developers to write modular, reusable code and organize it in a more logical and manageable manner. Some popular OOP languages include Java, Python, and C++. Proficiency in OOP concepts and languages is a valuable specialized skill for software developers and engineers, as it enables them to create more efficient and scalable software applications.