When Did Object Oriented Programming Started?


Angela Bailey

Object Oriented Programming (OOP) is a programming paradigm that has revolutionized the way software development is approached. It provides a structured and efficient way to design and build complex applications.

But when did Object Oriented Programming start? Let’s take a journey back in time to explore the origins of this powerful programming paradigm.

The Birth of Object Oriented Programming

In the early 1960s, computer scientists were exploring new ways to write programs that could better handle the growing complexity of software systems. One of the pioneers in this field was Alan Kay, who is widely credited with coining the term “Object Oriented Programming.”

OOP as we know it today, however, didn’t truly emerge until the early 1970s. It was during this time that Simula, a programming language created by Ole-Johan Dahl and Kristen Nygaard, introduced key concepts that would lay the foundation for OOP.

The Simula Language

Simula was designed to model real-world systems by introducing the concept of classes and objects. This allowed programmers to define abstract data types with their own operations and behaviors. Simula also introduced concepts like inheritance and polymorphism, which are now considered fundamental aspects of OOP.

The Simula language gained popularity within academia and research institutions, providing a platform for further exploration into object-oriented concepts.

The Rise of Smalltalk and C++

In the 1970s, another significant milestone in OOP occurred with the introduction of Smalltalk. Smalltalk was developed at Xerox PARC by Alan Kay, Dan Ingalls, Adele Goldberg, Ted Kaehler, Diana Merry, Scott Wallace, and others. Smalltalk took the ideas from Simula and refined them further.

Smalltalk was characterized by its simplicity and elegance, making it accessible to a wider audience. It introduced the concept of a graphical user interface (GUI) and emphasized message passing between objects.

Another major development in OOP came in the early 1980s with the creation of C++. C++ was developed by Bjarne Stroustrup as an extension of the popular C programming language. It combined procedural programming with object-oriented concepts, allowing programmers to seamlessly mix both paradigms.

Modern Object Oriented Programming

Since the introduction of Simula, Smalltalk, and C++, OOP has continued to evolve and be adopted by numerous programming languages. Today, languages such as Java, Python, C#, Ruby, and many others fully embrace the principles of OOP.

The Benefits of Object Oriented Programming

  • Modularity: OOP allows for better code organization by breaking down complex systems into smaller, more manageable modules (classes).
  • Reusability: With concepts like inheritance and polymorphism, OOP promotes code reuse, reducing development time and effort.
  • Maintainability: By encapsulating data within objects and providing well-defined interfaces, OOP makes it easier to maintain and debug software systems.
  • Scalability: OOP provides a scalable approach to software development where new features can be added without affecting existing code.

The Future of Object Oriented Programming

OOP has undoubtedly had a profound impact on software development. However, as technology continues to advance at an unprecedented rate, new paradigms and approaches are emerging, such as functional programming and reactive programming.

While these paradigms challenge some of the fundamental concepts of OOP, many believe that a combination of different programming paradigms will be the way forward. The key is to choose the right tools and approaches for each specific problem.


Object Oriented Programming has come a long way since its inception in the 1970s. From Simula to Smalltalk and C++, OOP has provided software developers with a powerful set of tools for creating complex and maintainable applications.

While there may be new paradigms on the horizon, OOP remains an essential skill for any programmer. Its modularity, reusability, maintainability, and scalability make it a valuable approach to solving real-world problems.

So next time you write code using classes and objects, remember the pioneers who shaped this paradigm and the countless hours of research and development that have made Object Oriented Programming what it is today.

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