Corbató, Merwin-Daggett and Daley: an experimental time-sharing system

What changed

Interactive multi-user computing was concretely implemented and analyzed on an IBM 7090.

Scientific scope

1962 three-author paper on system demonstrated from 1961; later CTSS extensions and Multics excluded.

Evidence

The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The record is the 1962 three-author paper describing the system demonstrated from 1961. Later CTSS features, Multics and the full MIT staff contribution are separate.

Contributors

• Fernando J. Corbató · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
• Marjorie Merwin-Daggett · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
• Robert C. Daley · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.

• Corbató, Merwin-Daggett and Daley, An Experimental Time-Sharing System
• IEEE record for CTSS—The Compatible Time-Sharing System

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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