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Hoare: monitors as an operating-system structuring concept

Contribution grade

Operating systems and concurrency · FORMALIZATION

Reference score130,000Provisional editorial estimate of this exact contribution; its grade is assessed separately.

What changed

Specified the monitor as a structured synchronization mechanism that combines shared data, procedures and condition variables for controlling concurrent processes.

Scientific scope

The record is the exact 1974 Communications of the ACM article. Earlier mutual-exclusion and semaphore work, language-specific monitor implementations and later concurrency abstractions 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 1974 Communications of the ACM article. Earlier mutual-exclusion and semaphore work, language-specific monitor implementations and later concurrency abstractions remain separate.

Contributors

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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