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Ole-Johan Dahl
Computer scientist

Ole-Johan Dahl

Famoose for

Co-creating Simula and the foundations of object-oriented programming.

Simula 67 · Structured Programming

Born
12 October 1931
Birthplace
Mandal
Died
29 June 2002

More people

Ada LovelaceRecognising what a programmable machine could do beyond arithmetic.Alan TuringHelping break Enigma and laying foundations for computer science.Grace HopperHelping make computer programming readable in English-like language.

Ole-Johan Dahl

Ole-Johan Dahl was a Norwegian computer scientist whose collaboration with Kristen Nygaard introduced influential ways of organising software.

Early life

Education

Studied numerical mathematics at the University of Oslo after his family returned from wartime refuge in Sweden.

Career

  1. 1960s

    Simula

    Developed simulation languages at the Norwegian Computing Center.

  2. 1968

    Professorship

    Became a professor at the University of Oslo.

  3. 2001

    Turing Award

    Shared the award with Kristen Nygaard.

Contributions

Simula 67

Established classes, objects and inheritance as programming concepts.

Structured Programming

Co-authored the book with Edsger Dijkstra and C. A. R. Hoare.

Beyond research

Recognition

The Dahl–Nygaard Prize commemorates his and Nygaard’s contributions.

Sources & photo creditBiography and career ↗Biographical references ↗

Original photograph. Cropped and displayed in monochrome.

Photo: Creator not stated; see image source. Source credit retained; reuse licence not established · Original image. Cropped and displayed in monochrome.