6th Edition of Research Unix alias UNIX Time-Sharing System
Version 6 Unix
Version 6 Unix for the PDP-11, running in the SIMH PDP-11 simulator
Developer
AT&T Bell Laboratories
Written in
C, assembly
OS family
Unix
Working state
Historic
Source model
Open source
Initial release
May 1975; 49 years ago (1975-05)
Marketing target
Minicomputers
Available in
English
Platforms
DEC PDP-11
Default user interface
Command-line interface (Thompson shell)
License
Originally proprietary commercial software, now free software under a BSD License
Preceded by
Version 5 Unix
Succeeded by
Version 7 Unix
Sixth Edition Unix, also called Version 6 Unix or just V6, was the first version of the Unix operating system to see wide release outside Bell Labs. It was released in May 1975 and, like its direct predecessor, targeted the DEC PDP-11 family of minicomputers. It was superseded by Version 7 Unix in 1978/1979, although V6 systems remained in regular operation until at least 1985.[1]
AT&T Corporation licensed Version 5 Unix to educational institutions only, but licensed Version 6 also to commercial users for $20,000, and it remained the most widely used version into the 1980s.[2] An enhanced V6 was the basis of the first ever commercially sold Unix version, INTERACTIVE's IS/1. Bell's own PWB/UNIX 1.0 was also based on V6, where earlier (unreleased) versions were based on V4 and V5. Whitesmiths produced and marketed a (binary-compatible) V6 clone under the name Idris.
^Quarterman, John S.; Silberschatz, Abraham; Peterson, James L. (December 1985). "4.2BSD and 4.3BSD as examples of the Unix system". Computing Surveys. 17 (4): 379–418. CiteSeerX 10.1.1.117.9743. doi:10.1145/6041.6043. S2CID 5700897. There are even some Version 6 systems still in regular operation.
^Fiedler, Ryan (October 1983). "The Unix Tutorial / Part 3: Unix in the Microcomputer Marketplace". BYTE. p. 132. Retrieved 30 January 2015.
Sixth Edition Unix, also called Version6Unix or just V6, was the first version of the Unix operating system to see wide release outside Bell Labs. It...
Version 7 Unix, also called Seventh Edition Unix, Version 7 or just V7, was an important early release of the Unix operating system. V7, released in 1979...
The term "Research Unix" refers to early versions of the Unix operating system for DEC PDP-7, PDP-11, VAX and Interdata 7/32 and 8/32 computers, developed...
Issue 6 System Interfaces, Issue 6 Shell and Utilities, Issue 6 Rationale (Informative) X/Open Curses, Issue 4, Version 2 and is at the core of the UNIX 03...
Ancient UNIX is any early release of the Unix code base prior to Unix System III, particularly the Research Unix releases prior to and including Version 7 (the...
systems that comply with the Single UNIX Specification (SUS). Early versions of Unix ran on PDP-11 computers. Unix systems are characterized by a modular...
and came to Berkeley as a visiting professor. He helped to install Version6Unix and started working on a Pascal implementation for the system. Graduate...
Unix System V (pronounced: "System Five") is one of the first commercial versions of the Unix operating system. It was originally developed by AT&T and...
The history of Unix dates back to the mid-1960s, when the Massachusetts Institute of Technology, AT&T Bell Labs, and General Electric were jointly developing...
The Thompson shell was the first Unix shell, introduced in the first version of Unix in 1971, and was written by Ken Thompson. It was a simple command...
and some other Unix systems, retrofitted symbolic links to their versions of the Version 7 Unix file system, although the original version didn't support...
Current Unix time 1714750297 (update) 2024-05-03T15:31:37+00:00 Unix time is a date and time representation widely used in computing. It measures time...
the Open Software Foundation (OSF). A primary aim was to develop a version of Unix, named OSF/1, to compete with System V Release 4 from AT&T Corporation...
one of Unix's developers at AT&T. Weiner was joined by Heinz Lycklama, also a veteran of AT&T and previously the author of a Version6Unix port to the...
systems. It is a distant descendant of the original filesystem used by Version 7 Unix. A UFS volume is composed of the following parts: A few blocks at the...
A Unix shell is a command-line interpreter or shell that provides a command line user interface for Unix-like operating systems. The shell is both an interactive...
designed and implemented by Ken Thompson in the first experimental version of Unix, dated 1969. As in other operating systems, the filesystem provides...
his alma mater, UC Berkeley. There, he helped to install Version6Unix on a PDP-11/70. Unix at Berkeley would later become maintained as its own system...
specified in an ioctl system call. This error originated in early UNIX. In Version6UNIX and earlier, I/O control was limited to serial-connected terminal...
necessary—dismisses them via setuid() with a non-zero argument as demonstrated in the Version6Unix source code. The kernel always runs with maximum privileges since it...
acquired by SCO Group, and now owned by Xinuos. Early versions of OpenServer were based on UNIX System V, while the later OpenServer 10 is based on FreeBSD...
of 1987. It was inherited into the first version of POSIX.1 and the Single Unix Specification. Unix and Unix-like operating systems maintain the idea...
19 January 2038. The problem exists in systems which measure Unix time – the number of seconds elapsed since the Unix epoch (00:00:00 UTC on 1 January 1970) – and store...
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