A Commentary on the Unix Operating System starts with notes on Unix and other useful documentation ( the Unix manual pages, DEC hardware manuals and so on ), a section on the architecture of the PDP-11 and a chapter on how to read C programs.

* Operating system descriptors of resources that are allocated to the process, such as file descriptors ( Unix terminology ) or handles ( Windows ), and data sources and sinks.

* Operating system: early workstations ran the Unix operating system ( OS ) or a Unix-like variant or equivalent such as VMS.

Domain / OS ( Distributed On-line Multi-access Interactive Network / Operating System ) was initially a layer over Aegis and was not built on a Unix kernel.

Among Unix Operating system variants, HP-UX has introduced a feature called " HP-UX Whitelisting " on 11iv3 version.

* IOS on Unix, Cisco's Internetwork Operating System on Unix

Operating systems were DOS / ADT ( several versions ) and Unix.

The tool appears in IBM's AIX version of Unix and the Solaris Operating System from Sun Microsystems.

* Dennis Ritchie, inventor of C. Unix Operating System, Plan 9 Operating System.

* Ken Thompson, inventor of / B /, Go Programming Language, Inferno Programming Language, and Unix Operating System co-author.

* Operating system kernel ( e. g. Linux, Unix )

It is produced by X / Open and included in various Unix operating systems, primarily the Solaris Operating Environment versions 2. 5 to 9.

Centram Systems product, called TOPS (" Transcendental Operating System "), allowed transparent file sharing among Macs, PCs, and Unix machines, using the AppleTalk protocol.

AIX / 370 was IBM's third attempt to offer Unix-like functionality for their mainframe line, specifically the System / 370 ( the prior versions were a TSS / 370 based Unix system developed jointly with AT & T c. 1980, and VM / IX a VM / 370 based system developed jointly with Interactive Systems Corporation c. 1984 ).

Berkeley DB includes compatibility interfaces for some historic Unix database libraries: dbm, ndbm and hsearch ( a System V library for creating in-memory hash tables ).

Many Unix, GNU, BSD and Linux programs and packages have been ported to Cygwin, including the X Window System, K Desktop Environment 3, GNOME, Apache, and TeX.

The Cygwin / X project contributes an implementation of the X Window System that allows graphical Unix programs to display their user interfaces on the Windows desktop.

* On a computer running Microsoft Windows, Mac OS X, or Unix running the X Window System, clicking the secondary mouse button ( usually the right button ) opens a context menu for the region that is under the mouse pointer.

* Amiga Unix-Operating system for the Amiga, based on Unix System V Release 4

First published in the System V Application Binary Interface specification, and later in the Tool Interface Standard, it was quickly accepted among different vendors of Unix systems.

An early-1990s style Unix desktop running the X Window System graphical user interface

The primary volume descriptor acts much like the superblock of the Unix File System, providing details on the ISO 9660 compliant portion of the disk.

The success of the BSD curses library prompted Bell Labs to release an enhanced curses library in their System III and System V Release 1 Unix systems.

* Open Sound System, a standard interface for making and capturing sound in Unix operating systems

* Unix ( many versions, including Version 6 Unix, Version 7 Unix, UNIX System III, and 2BSD )

* Metisse and Unix Desktop Environment, window managers for the X Window System

The first popular implementation of RPC on Unix was Sun's RPC ( now called ONC RPC ), used as the basis for Network File System.

The troff collection of tools ( including pre-and post-processors ) was eventually called Documenter's WorkBench ( DWB ), and was under continuous development in Bell Labs and later at the spin-off Unix System Laboratories ( USL ) through 1994.

Dave Prosser of Unix System Laboratories submitted a proposal for one that had faster implementation characteristics and introduced the improvement that 7-bit ASCII characters would only represent themselves ; all multibyte sequences would include only bytes where the high bit was set.

* XZip Free Z-Machine interpreter for X Window System ( Unix / Linux )

HP-UX ( Hewlett-Packard UniX ) is Hewlett-Packard's proprietary implementation of the Unix operating system, based on UNIX System V ( initially System III ) and first released in 1984.

OSF / 1 was envisaged to be the third major branch of the Unix family tree, after System V and BSD.

In 1994, after AT & T had sold UNIX System V to Novell and the rival Unix International consortium had disbanded, the Open Software Foundation ceased funding of research and development of OSF / 1.

Although born from the same history of Unix, Internet free software, and the hacker culture as the free software movement launched by Richard Stallman and his Free Software Foundation, the Open Source Initiative was formed and chose the term open source, in Michael Tiemann's words, to " dump the moralizing and confrontational attitude that had been associated with ' free software ' in the past and sell the idea strictly on the same pragmatic, business-case grounds that had motivated Netscape.

Lions ' Commentary on UNIX 6th Edition, with Source Code by John Lions ( 1976 ) contains the complete source code of the 6th Edition Unix kernel plus a commentary.

Source code was available for only the Unix version under a license written by the University of Washington.

* Windows Interface Source Environment-a 1994 method of emulating Microsoft Windows applications on Unix and Macintosh hosts

Several Open Source programs have become defining entries in their space, including the GIMP image editing system ; Sun's Java programming language and environment ; the MySQL database system ; the FreeBSD Unix operating system ; Sun's OpenOffice. org office productivity suite ; and the Wireshark network packet sniffer and protocol analyser.

Or, according to Open Source advocate Eric Raymond, BSD systems can be considered " genetic Unix ", if not " trademark Unix ".

* Lions ' Commentary on UNIX 6th Edition, with Source Code, a Unix kernel book by John Lions

Source for this diagram is in the format used by the Unix program dia: Image: Cache, basic. dia

The Portland Linux / Unix Group ( PLUG ) is a group of Linux and Open Source enthusiasts in Portland, Oregon.