The UNIX Time-Sharing System Alive
The UNIX Time-Sharing System
KindPaper
Published1974
StatusAlive
AuthorsRitchie & Thompson
FieldSystems
Sourcedsf.berkeley.edu ↗
The CACM paper that told the world what Bell Labs had built — processes, pipes, the file idea, and a system small enough to read. It won the Turing Award nine years later.
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Describes Research Unix
Published in CACM in July 1974, the paper described a five-year-old system: a hierarchical file system where devices are files, a shell of composable tools joined by pipes, and fork/exec processes — all implemented in a few thousand lines most graduate students could read.
The 'salient features' list — file structure, simplicity of interface, device independence — reads obvious now because it won completely. The paper ended Multics-scale systems ambitions and set the architecture every subsequent OS either follows or consciously rejects.