Simula is a programming language developed in the 1960s at the Norwegian Computing Centre in Oslo, primarily by Ole-Johan Dahl and Kristen Nygaard. Syntactically, it is a superset of Algol60, adding features that are close to the modern idea of classes and objects, plus coroutines. Computer code (HTML with JavaScript) in a tool that uses syntax highlighting (colors) to help the developer see the purpose of each piece of code. ... Norwegian Computing Centre (NCC, in Norwegian: Norsk Regnesentral or NR for short) is a private, independent, non-profit research foundation dating its history back to 1952. ... County Oslo NO-03 District Viken Municipality NO-0301 Administrative centre Oslo Mayor (2004) Per Ditlev-Simonsen (H) Official language form Neutral Area  - Total  - Land  - Percentage Ranked 224 454 km² 426 km² 0. ... Professor emeritus Ole-Johan Dahl (October 12, 1931 – June 29, 2002) was a Norwegian computer scientist and is considered to be one of the fathers of Simula and object-oriented programming along with Kristen Nygaard. ... Kristen Nygaard Kristen Nygaard (August 27, 1926 - August 10, 2002) was a Norwegian mathematician, computer programming language pioneer and politician. ... ALGOL (short for ALGOrithmic Language) is a programming language originally developed in the mid 1950s which became the de facto standard way to report algorithms in print for almost the next 30 years. ... In object-oriented programming, classes are used to group related variables and functions. ... An object is fundamental concept in object-oriented programming. ... Coroutines are program components like subroutines. ...

Simula introduced the object-oriented programming paradigm and thus can be considered the first object-oriented programming language and a predecessor to Smalltalk, C++, Java, C#, and all modern class-based object-oriented languages. As its name implies, Simula was designed for doing simulations, and the needs of that domain provided the framework for many of the features of object-oriented languages today. Object-oriented programming (OOP) is a computer programming paradigm in which a software system is modeled as a set of objects that interact with each other. ... A programming paradigm is a paradigmatic style of programming (compare with a methodology which is a paradigmatic style of doing software engineering). ... An object-oriented programming language (also called an OO language) is one that allows or encourages, to some degree, object-oriented programming methods. ... Smalltalk is a dynamically typed object oriented programming language designed at Xerox PARC by Alan Kay, Dan Ingalls, Ted Kaehler, Adele Goldberg, and others during the 1970s. ... C++ (pronounced see plus plus, IPA: ) is a general-purpose computer programming language. ... Java is an object-oriented programming language developed by James Gosling and colleagues at Sun Microsystems in the early 1990s. ... The title given to this article is incorrect due to technical limitations. ... Class-based programming, or more commonly class-orientation, refers to the style of object-oriented programming in which inheritance is achieved by defining classes of objects, as opposed to the objects themselves (compare Prototype-based programming). ...

Simula was never just an academic language (it was still used for a few real-world applications as of 2003), but its historical influence is considered far more important than any actual work done with it. 2003 is a common year starting on Wednesday of the Gregorian calendar, and also: The International Year of Freshwater The European Disability Year Events January events January 1 Luíz Inácio Lula Da Silva becomes the 37th President of Brazil. ...

Classic Hello world

Note that Simula is case-insensitive. An example of a Hello world program in Simula: To meet Wikipedias quality standards, this article or section may require cleanup. ...

 (* a comment *) BEGIN outtext("Hello World!"); END; 

Classes in Simula

Simula was the first Object-Oriented Programming Language. This means that Simula knows about objects and classes of objects. Each class is a package or module of procedures, functions, and data. From a class, it is possible to create instances as a way to get objects that represent entities from the real world. The set of objects and their relations may be used in simulations of some aspect of our world.

Here is a simple class in Simula:

 Begin Class Greetings; Begin OutText("Hello World!"); OutImage; End; REF(Greetings) hello; hello :- New Greetings; End of program; 

This program says "Hello World!" too.

See also

• Object-oriented programming
• BETA programming language (a modern successor to Simula)
• Simulation language
• ENEA AB

In computer science, object-oriented programming, OOP for short, is a computer programming paradigm. ... BETA is a pure object-oriented language from the Scandinavian School in System Development where the first object-oriented language Simula was developed. ... A computer simulation language describes the operation of a simulation on a computer. ... ENEA is a Swedish information techonology company from Täby working in the area of operating systems and consulting. ...

External links

• Introduction to OOP in Simula – By J.Sklenar, based on the 1997 seminar "30 Years of Object Oriented Programming (OOP)" at the U. of Malta
• How Object-Oriented Programming Started – By Dahl and Nygaard, abbrev. version of an encyclopedia article; on Nygaards home page
• Simula at the University of Montreal Includes tutorials, documentation, and links in English and in French