Dahl and Nygaard: SIMULA, an ALGOL-based simulation language

What changed

Specified SIMULA as an ALGOL-based language for discrete-event simulation, including processes, event scheduling and quasi-parallel execution.

Scientific scope

The record is the exact 1966 Communications of the ACM paper. Earlier SIMULA implementations, later SIMULA 67 class concepts, Smalltalk and the wider history of object-oriented programming remain separate.

Evidence

The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The record is the exact 1966 Communications of the ACM paper. Earlier SIMULA implementations, later SIMULA 67 class concepts, Smalltalk and the wider history of object-oriented programming remain separate.

Contributors

• Ole-Johan Dahl · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
• Kristen Nygaard · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.

• Dahl and Nygaard, SIMULA paper copy
• DBLP record for SIMULA

Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.

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