The document discusses object-oriented programming and how it overcomes limitations of procedural programming by modeling real-world entities like objects that have properties and behavior. It introduces basic concepts of OOP like classes, objects, inheritance and provides examples of C++ code showing function definitions and a class to manage a ship reservation system with methods to get, add, list, and cancel reservations. The code sample demonstrates object-oriented principles like encapsulation through the use of public and private class members.