Unix variants

macOS (previously OS X and originally Mac OS X) is a proprietary Unix operating system, derived from OPENSTEP for Mach and FreeBSD, which has been marketed and developed by Apple since 2001. It is the current operating system for Apple's line of Mac computers. Within the market of desktop and laptop computers, it is currently the second most widely used desktop OS, after Microsoft Windows and ahead of all Linux distributions, including ChromeOS and SteamOS. , the most recent release of macOS is macOS 26 Tahoe, the 22nd major version of macOS.

GNU ( ) is an extensive collection of free software (387 packages ), which can be used as an operating system or can be used in parts with other operating systems. The use of the completed GNU tools led to the family of operating systems popularly known as Linux. Most of GNU is licensed under the GNU Project's own General Public License (GPL).

Unix-like operating system kernel, basis for all Linux operating systems

MINIX is a Unix-like operating system based on a microkernel architecture, first released in 1987 and written by American-Dutch computer scientist Andrew S. Tanenbaum. It was designed as a clone of the Unix operating system and one that could run on affordable, Intel 8086-based home computers; MINIX was targeted for use in classrooms by computer science students at universities.

thumb|upright=1.8|Evolution of Unix and Unix-like systems, starting in 1969|class=skin-invert-image

general-purpose kernel suitable for the GNU operating system

operating system

Xenix is a discontinued Unix operating system for various microcomputer platforms, licensed by Microsoft from AT&T Corporation. The first version was released in 1980, and Xenix was the most common Unix variant during the mid- to late-1980s. The Santa Cruz Operation (SCO) acquired exclusive rights to the software, and eventually replaced it with SCO UNIX, later known as OpenServer 5, with the final Xenix version released in 1991.

EMUI (formerly known as Emotion UI) is an interface based on Android developed by Chinese technology company Huawei, used on the company's smartphones primarily globally.

core Unix-like operating system of macOS, iOS, etc.

operating system

NeXTSTEP is a discontinued object-oriented, multitasking operating system based on the Mach kernel and the UNIX-derived BSD. It was developed by NeXT, founded by Steve Jobs, in the late 1980s and early 1990s and was initially used for its range of proprietary workstation computers such as the NeXT Computer. It was later ported to several other computer architectures and was later bought by Apple Inc. to replace the older Classic Mac OS with macOS.

discontinued Linux distribution

operating system

SerenityOS is a free and open source desktop operating system. It features a preemptive kernel, currently supports x86-64, ARM, and RISC-V based computers, and hosts multiple complex applications including its own web browser and integrated development environment (IDE).

The LynxOS RTOS is a Unix-like real-time operating system from Lynx Software Technologies (formerly "LynuxWorks"). Sometimes known as the Lynx Operating System, LynxOS features full POSIX conformance and, more recently, Linux compatibility. LynxOS is mostly used in real-time embedded systems, in applications for avionics, aerospace, the military, industrial process control and telecommunications.

Chinese computer operating system

Redox is a Unix-like operating system based on a microkernel design. It is community-developed, released as free and open-source software and distributed under an MIT License. Written in the programming language Rust, Redox aims to be a general-purpose operating system that is safe and reliable. It is currently in a pre-stable status.

system software for the PlayStation 3

The original Unix operating system from Bell Labs, developed by Ken Thompson and Dennis Ritchie

MkLinux (Microkernel Linux) is a discontinued open-source experimental operating system for PowerPC Macintosh computers. It was launched in 1995 as a collaboration between the Open Software Foundation (OSF) and Apple Computer, as a critical pivot in Apple's technical and social history. MkLinux became Apple's first official free and open-source software community project, and the debut of Linux on the first Power Macintosh.

distribution of the GNU/Hurd operating system

system software

xv6 is a modern reimplementation of Sixth Edition Unix in ANSI C for multiprocessor x86 and RISC-V systems. It was created for educational purposes in MIT's Operating System Engineering course in 2006.

BeleniX is a discontinued operating system distribution built using the OpenSolaris source base. It can be used as a Live CD as well as installed to a hard disk. Initially developed as a Live CD along the lines of Knoppix to showcase OpenSolaris technologies, Belenix went on to become the initial base for Sun's OpenSolaris distribution. A number of technologies pioneered in the Belenix project have gone on to become full projects in their own right within the OpenSolaris ecosystem.

Linux distribution

EulerOS is a commercial Linux distribution developed by Huawei based on Red Hat Enterprise Linux to provide an operating system for server and cloud environments. Its open-source community version is known as openEuler; the source code of openEuler was released by Huawei at Gitee in January 2020. openEuler became an open-source project operated by OpenAtom Foundation after Huawei donated the source code of openEuler to the foundation on November 9, 2021.

Venix is a discontinued version of the Unix operating system for low-end computers, developed by VenturCom, a "company that specialises in the skinniest implementations of Unix".

experimental Unix-like distributed operating system

operating system

6th Edition of Research Unix alias UNIX Time-Sharing System

The '''Programmer's Workbench (PWB/UNIX''') was an early, now discontinued, version of the Unix operating system that had been created in the Bell Labs Computer Science Research Group of AT&T. Its stated goal was to provide a time-sharing working environment for large groups of programmers, writing software for larger batch processing computers.

American producer of computer servers and software

company

implementation of UNIX on the z/OS operating system

1990s UNIX coalition

operating system

Fiwix is an operating system kernel based on the UNIX architecture and fully focused on being POSIX compatible. It is designed and developed mainly as a hobbyist operating system, but it also serves for educational purposes. It runs on the i386 hardware platform and is compatible with a good base of existing GNU applications. It follows the UNIX System V application binary interface and is also mostly Linux 2.0 i386 system call ABI compatible.