Unix Heritage Wiki - systems

1st_edition

Anonymous (anonymous@undisclosed.example.com) — 2023-02-15T21:04:09+00:00

First Edition Unix Release Date: November 1971 Released By: Bell Labs Research Source Code: svntree-20081216.tar.gz in the Unix Archive, browsable in the Unix Tree Documentation: 1st Edition man pages The first edition of Unix was developed for the PDP-11/20 at Bell Labs by Ken Thompson, Dennis Ritchie and others. It provided a process-oriented multitasking environment with a hierachical filesystem for about two or three users.

2nd_edition

Anonymous (anonymous@undisclosed.example.com) — 2023-05-22T22:17:30+00:00

Second Edition Unix Release Date: June 12, 1972 Released By: Bell Labs Research Source Code: some source code is in the Unix Archive, browsable in the Unix Tree Documentation: 2nd Edition man pages The Second Edition of Unix was developed for the PDP-11/20 at Bell Labs by Ken Thompson, Dennis Ritchie and others. It extended the First Edition with more system calls and more commands. This edition also saw the beginning of the C language, which was used to write some of the commands.

3rd_edition

Anonymous (anonymous@undisclosed.example.com) — 2023-10-18T06:25:47+00:00

Third Edition Unix Release Date: February, 1973 Released By: Bell Labs Research Source Code: some source code is in the Unix Archive, browsable in the Unix Tree Documentation: 3rd Edition man pages The Third Edition of Unix was the last version with a kernel still written in assembly code, but is the first version to include pipes. More specifically, the Third Edition kernel targets the PDP-11/45 hardware including making use of protection and extended arithmetic features. For much of 197…

4th_edition

Anonymous (anonymous@undisclosed.example.com) — 2023-10-18T06:35:31+00:00

Fourth Edition Unix Release Date: November 1973 Released By: Bell Labs Research Source Code: a kernel which predates 4th Edition is nsys.tar.gz in the Unix Archive Documentation: 4th Edition man pages, browsable in the Unix Tree The fourth edition of Unix was the first version to have a kernel written in a high level language, C, along with some of the commands. A full and complete copy of Fourth Edition no longer exists. We have:

5th_edition

Anonymous (anonymous@undisclosed.example.com) — 2023-02-15T21:05:38+00:00

Fifth Edition Unix Release Date: June 1974 Released By: Bell Labs Research Source Code: v5root.tar.gz in the Unix Archive, browsable in the Unix Tree Documentation: 5th Edition man pages The Fifth Edition of Unix was released by Bell Laboratories in June 1974. It was designed to run on the PDP-11s with 18-bit addressing and without separate Instruction and Data spaces, for example the PDP-11/40. The kernel's image size was around 26 Kbytes. At this stage in the development of Unix, neithe…

6th_edition

Anonymous (anonymous@undisclosed.example.com) — 2023-02-15T21:05:48+00:00

Sixth Edition Unix Release Date: May 1975 Released By: Bell Labs Research Source Code: v6src.tar.gz in the Unix Archive, browsable in the Unix Tree Documentation: 6th Edition man pages The Sixth Edition of Unix was released by Bell Laboratories in May 1975. It was designed to run on the PDP-11s with 18-bit addressing such as the PDP-11/40, 11/45 and 11/70. The kernel's image size was around 29 Kbytes. This edition introduced the `Portable C Library' written by Mike Lesk, which would evol…

7th_edition

Anonymous (anonymous@undisclosed.example.com) — 2023-02-15T21:06:13+00:00

Seventh Edition Unix Release Date: January 1979 Released By: Bell Labs Research Source Code: v7.tar.gz in the Unix Archive, browsable in the Unix Tree Documentation: 7th Edition man pages are bundled in v7.tar.gz The Seventh Edition of Unix was released by Bell Laboratories in January 1979, nearly four years after Sixth Edition.

32bit_bsds

Anonymous (anonymous@undisclosed.example.com) — 2019-12-01T03:06:04+00:00

3BSD 4BSD 4.1BSD 4.2BSD 4.3BSD 4.4BSD

32v

Anonymous (anonymous@undisclosed.example.com) — 2023-02-15T21:06:23+00:00

UNIX/32V Release Date: June 1979 Released By: Bell Labs, Holmdel, New Jersey Source Code: Browse UNIX/32V source code Documentation: included in the source code UNIX/32V is a discontinued version of the Unix operating system released by Bell Labs. It is a port of the 7th Edition Unix to Digital Equipment Corporation's VAX 11/780, a 32 bit computer done by Tom London and John Reiser. Although UNIX/32V did allow larger programs, it was still swap based and did not implement virtual memory. …

cb1

Anonymous (anonymous@undisclosed.example.com) — 2023-05-28T20:13:21+00:00

CB-UNIX Release Date: Edition 2.1: November, 1979; Release 3: February 9, 1980; Edition 2.3: May, 1981 Released By: CB-UNIX Support Group Source Code: SourceCode contains PDF scans of a paper source printout of the “CB UNIX Release 3” kernel dated February 9, 1980

commercial_unixes

Anonymous (anonymous@undisclosed.example.com) — 2026-01-22T03:17:50+00:00

There were many commercial versions of Unix and BSD. This page is obviously far from a definitive list, but it will provide links to those in the TUHS Archive. V7M Ultrix Venix gl2 4D1/IRIX Unixware

early_bsds

Anonymous (anonymous@undisclosed.example.com) — 2019-12-01T03:04:51+00:00

1BSD 2BSD

gl2

Anonymous (anonymous@undisclosed.example.com) — 2026-01-21T05:16:51+00:00

Silicon Graphics Computer Systems GL2 Release Date: May, 1986 Released By: Silicon Graphics Computer Systems Source Code: 3.6 archived on Bitsavers History: SGI GL2 is an early derivative of System V "Release 0" released on the IRIS 1000 through 3000 terminals and workstations (The different editions are prefixed with T for terminal or W for workstation).

irix

Anonymous (anonymous@undisclosed.example.com) — 2026-01-21T05:59:15+00:00

Silicon Graphics 4D1 / IRIX First Release Date: 1988-1989 Final Release Date: August 16th, 2006 Released By: Silicon Graphics Source Code: Never officially released, partially leaked History: SGI 4D1 was the followup to gl2, combining elements of that and MIPS Computer Systems risc/os. Early versions were based on System V Release 2 and 3, later versions, called IRIX, were based on Release 4.

mert0

Anonymous (anonymous@undisclosed.example.com) — 2023-05-21T07:31:23+00:00

MERT Release 0 Release Date: October, 1977 Released By: Small Systems Planning and Development Department Source Code: None Available Documentation: MERT_Release_0 contains PDF scans of the MERT Release 0 manuals MERT Release 0, otherwise known as UNIX Program Generic 1C600 Issue 1, is a real-time supervisor implementing the UNIX operating environment. MERT Release 0 follows an earlier version supported by

pdp7_unix

Anonymous (anonymous@undisclosed.example.com) — 2023-02-15T21:04:29+00:00

PDP-7 Unix Release Date: Developed from mid-1969 to the end of 1970 Released By: Never released outside of Bell Labs Source Code: Reconstructed from original listings Documentation: Reconstructed from original listings Ken Thompson began the development of the system that was to become Unix, first as a file system on paper and then on a

pwb

Anonymous (anonymous@undisclosed.example.com) — 2023-02-15T21:04:44+00:00

PWB Unix Release Date: July 1977 Released By: Unix Support Group Source Code: some source code is in the Unix Archive, browsable in the Unix Tree Documentation: included in the source code (borrowed from Wikipedia:) PWB/UNIX (for Programmer's Workbench) was an early version of Unix, started in 1973 by Evan Ivie and Rudd Canaday to support a computer center for a 1000-employee Bell Labs division, which would be the largest Unix site for several years to come. PWB/UNIX was to provide tools…

research

Anonymous (anonymous@undisclosed.example.com) — 2022-12-27T13:24:02+00:00

Research Unix These are the versions of Unix developed at Bell Laboratories, initially by Ken Thompson and Dennis Ritchie, later by many other of the researchers there. PDP-7 Unix First Edition Unix Second Edition Unix Third Edition Unix Fouth Edition Unix Fifth Edition Unix Sixth Edition Unix Seventh Edition Unix Eighth Edition Unix Ninth Edition Unix Tenth Edition Unix

start

Anonymous (anonymous@undisclosed.example.com) — 2015-12-29T09:47:12+00:00

Unix Systems Research Unix The versions of Unix developed at Bell Laboratories USL/USG Systems developed by the Unix Support Group and the Unix System Laboratories Other Early Unixes Modified versions of early Unix developed outside the Labs Early BSDs The 16-bit BSDs from the University of California, written for the PDP-11

sys3

Anonymous (anonymous@undisclosed.example.com) — 2023-02-15T21:05:02+00:00

System III Release Date: 1982 Released By: AT&T's Unix Support Group (USG) Source Code: A portion of the PDP-11 code is browsable in the System III source tree Documentation: included in the source code From Wikipedia UNIX System III (or System 3) is a discontinued version of the Unix operating system released by AT&T's Unix Support Group (USG).

sys5

Anonymous (anonymous@undisclosed.example.com) — 2023-02-15T21:06:32+00:00

System V Release Date: January 1983 (System V Release 1) Released By: AT&T's Unix Support Group (USG) Source Code: A portion of the PDP-11 code is browseable in the System V source tree Documentation: included in the source code From UNIX System V (pronounced: “

unixts4

Anonymous (anonymous@undisclosed.example.com) — 2023-05-21T07:45:35+00:00

UNIX Release 4 Release Date: June 1981 Released By: AT&T's Unix Support Group (USG) Source Code: No known source code preserved Documentation: UNIX User's Manual, UNIX Administrator's Manual, Documents for UNIX UNIX Release 4 was a major release of the PWB/UNIX line in the Bell System in 1981. Unlike the prior and following versions which were released as System III and System V respectively, there was no external release of this version as UNIX System IV.

unixware

Anonymous (anonymous@undisclosed.example.com) — 2026-01-22T03:31:55+00:00

Univel/Novell UnixWare/SCO UnixWare First Release Date: 1992 Final Release Date: 2018 Released By: Novell, later SCO, now Xinuos Source Code: Never officially released, leaks exist History: UnixWare was a product of the Unix Systems Laboratories section of AT&T, as they were releasing the USL System V release 4.2. It uses the VERITAS VxFS as of release 2. Novell quickly purchased both USL and Univel in 1993. UnixWare 1.1 was released in 1994 with full TCP/IP support in all editions (Uni…

usg2

Anonymous (anonymous@undisclosed.example.com) — 2024-07-08T23:31:54+00:00

USG PG-1C300 Issue 2 Release Date: January, 1976 Released By: UNIX Support Group Source Code: None Available Documentation: UNIX Programmer's Manual PG-1C300 Issue 2 is the programmer's manual and UNIX Program Description is a description of the various routines in the Issue 2 kernel UNIX Program Generic Issue 2, otherwise known as PG-1C300, is a version of the UNIX operating system issued by the UNIX Support Group in January of 1976. The Program Generic line was used as a standard, suppo…

usg3

Anonymous (anonymous@undisclosed.example.com) — 2023-05-21T07:10:27+00:00

USG PG-1C300 Issue 3 Release Date: March, 1977 Released By: UNIX Support Group Source Code: None Available Documentation: MERT_Release_0's UNIX portion is based on the Issue 3 manual, and the introduction can be consulted as to which pages have been replaced as part of MERT Release 0

usl_usg

Anonymous (anonymous@undisclosed.example.com) — 2023-05-21T07:17:21+00:00

USL/USG Unix Originally set up to support Unix internally, the Unix Support Group eventually became Unix System Laboratories, and developed the System III and System V commercial versions of Unix. CB-UNIX USG Program Generic USG Generic 2 USG Generic 3 MERT Release 0 UNIX/TS 32V Unix PWB UNIX PWB UNIX 2.0 System III UNIX Release 4 System V