The UNIX time-sharing system

  title={The UNIX time-sharing system},
  author={D. Ritchie and K. Thompson},
  journal={Commun. ACM},
UNIX is a general-purpose, multi-user, interactive operating system for the Digital Equipment Corporation PDP-11/40 and 11/45 computers. It offers a number of features seldom found even in larger operating systems, including: (1) a hierarchical file system incorporating demountable volumes; (2) compatible file, device, and inter-process I/O; (3) the ability to initiate asynchronous processes; (4) system command language selectable on a per-user basis; and (5) over 100 subsystems including a… Expand
11 Citations
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