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The UNIX time-sharing system

1983; Association for Computing Machinery; Volume: 26; Issue: 1 Linguagem: Inglês

10.1145/357980.358014

1557-7317

Dennis M. Ritchie, Ken Thompson,

Parallel Computing and Optimization Techniques

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 a 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 dozen languages. This paper discusses the nature and implementation of the file system and of the user command interface.