Research Unix is a term used to refer to versions of the Unix operating system for DEC PDP-7 , PDP-11 , VAX, and Interdata 7/32 and 8/32 computers developed by Bell Labs Computing Science Research Center.
Content
- 1 History
- 2 Versions
- 3 Legacy
- 4 See also
- 5 notes
- 6 References
History
The term Research Unix first appeared in the Bell System Technical Journal (Volume 57, Number 6, Pt. 2 July / Aug 1978) to distinguish it from other versions (such as PWB / UNIX and MERT ), whose code base was based on the version CSRC However, this term was little used before Version 8 of Unix. Prior to this, the operating system was simply called UNIX (all letters are large) or UNIX Time-Sharing System.
Research Unix version names come from the manual version number.
All modern versions of Unix come from Version 7 (Unix 7th Edition).
Versions
| Version | Date of issue | Description |
|---|---|---|
| 1st Edition | November 3, 1971 | The first release of the Unix manual on the PDP-11 version. Unix was already 2 years old at the time and was ported from PDP-7 to PDP-11/20 in 1970. |
| 2nd Edition | June 12, 1972 | A total of 10 copies of this system were installed. |
| 3rd edition | February 1973 | The C language is introduced; 16 copies are installed. |
| 4th edition | November 1973 | The first Unix written in C. User group identifiers have also been introduced. The number of installations is more than 20. |
| 5th edition | June 1974 | Introduced sticky bit ; more than 50 installations. |
| 6th edition | May 1975 | The first Unix, widely distributed outside of Bell Labs, and the first ported to a platform other than PDP. In May 1977, the MINI-UNIX version for low- powered PDP-11 /10 machines appeared. |
| 7th edition | January 1979 | The ancestor of all modern UNIX and the latest widespread release of Research Unix. It combines most of the utilities from PWB / UNIX and the heavily modified V6 kernel. In February, the UNIX / 32V version for the DEC VAX platform appeared; based on V32, 4BSD was created. |
| 8th edition | February 1985 | Modified version 4.1cBSD; for internal use |
| 9th edition | September 1986 | Code from 4.3BSD; for internal use |
| 10th edition | October 1989 | Latest Research Unix. |
| Plan 9 1st Edition | 1993 year | Designed based on Research Unix by the same development team |
Legacy
In 2002, Caldera International released Unix Revision 7 as an open source software under a licensing BSD-compliant license . [2] [3] [4]
In 2017, the Unix Heritage Society , Alcatel-Lucent USA Inc., Nokia and Bell Laboratories , published Research Unix in editions v8, v9, v10 with the obligation [5] : "not to prevent non-commercial copying, distribution, execution, display in any form Research Unix®1, revisions 8, 9 and 10, shall not assert their copyrights in the case of the creation of derivative works based on it. " .
See also
- Inferno (operating system)
Notes
- ↑ Caldera releases the original Unix systems under the BSD license at slashdot.org (2002)
- ↑ UNIX is free! . lemis.com (January 24, 2002).
- ↑ Broderick, Bill Dear Unix enthusiasts, . Caldera International (January 23, 2002). Archived February 19, 2009.
- ↑ Darwin, Ian F. Why Caldera Released Unix: A Brief History . Linuxdevcenter O'Reilly Media (February 3, 2002). Date of treatment January 19, 2016.
- ↑ Samizdat no more: Old Unix source code opened for study Richard Chirgwin on register.com (March 30, 2017)
Links
- UNIX evolution ( PostScript ) by Ian F. Darwin and Geoffrey Collyer
- Unix heritage - Links and code for some versions of Unix
- Evolution of the Unix Time-sharing System by Dennis Ritchie