2001 · Languages & software
Simula brought objects, classes and simulation together in a programming language.
Visual guide
Describe an entity with a class.
Create objects with their own state.
Let the objects carry out behaviour.
Objects offered a reusable vocabulary for modelling systems and managing the relationship between data and behaviour.
An object model is a design choice; it is not automatically the best fit for every computational problem.
01 · The idea
Ole-Johan Dahl and Kristen Nygaard developed Simula, whose ideas helped establish object-oriented programming. A model could contain entities with their own state and behaviour, organised through classes. This approach grew from simulation needs into a general way to structure software.
Objects offered a reusable vocabulary for modelling systems and managing the relationship between data and behaviour.
02 · The people
Kristen Nygaard approached programming through the need to model complicated real-world systems. At the Norwegian Computing Center, he and Ole-Johan Dahl developed Simula, bringing classes, objects, and inheritance into programming-language design. Nygaard emphasized simulation concepts and the relationship between software and its users. His later research at Oslo included participatory design, continuing his interest in how people help shape the systems they use.
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Ole-Johan Dahl combined programming-language theory with the implementation of Simula, developed with Kristen Nygaard at the Norwegian Computing Center. Their work introduced mechanisms for representing interacting objects and organizing related classes. Dahl’s later research at the University of Oslo emphasized rigorous reasoning about programs and object-oriented systems. His contribution joined elegant language concepts with the difficult engineering needed to make those concepts usable.
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Original explanations based on the official award record. The subject label is an editorial navigation aid.
Automata, grammars and algorithms helped make compilers teachable and dependable.
The story
Abstraction lets a system change inside while preserving its promises outside.
The story