OOPs (Object-Oriented Programming System)

Object means a real-world (thế giớt thực) entity such as a mobile, book, table, computer, watch, etc. Object-Oriented Programming is a methodology (phương thức) or paradigm (khuôn mẫu, dạng thức) to design a program using classes and objects. It simplifies (đơn giản hóa) software development and maintenance by providing some concepts (các khái niệm).