Distributed UNIX-compatible system featuring multi-level IPC and variable-weight processes.

University of Tokyo, Japan

Simple to use but highly sure and stable OS.

Massimo Angiolani, Italy

Free OpenWrt-based Linux distribution for a range of wireless routers based on Broadcom or Atheros chipsets.

Evolved in HRX.

General Comprehensive Operating System. Originally GECOS, General Electric Comprehensive Operating Supervisor.

General Electric, USA

Operating system of Honeywell-Italia Series 60 Level 62, evolved later as GCOS-4 on DPS-4.

GECOS-III renamed after Honeywell's acquisition of GE.

32-bits OS inspired by MULTICS.

See DOS (3).

GEC Computers, UK

General Electric Comprehensive Operating System.

General Electric, USA

Multiprogrammed OS for GE 365 series computers. First delivered version of GECOS.

Multiprogrammed OS for GE 600 series computers. Renamed GCOS-3 after Honeywell's aquisition of GE.

Free OS, where the philosophy is to make an OS with a very small footprint, working on old computers.

Fabricio Rocha, Brazil

Graphics Environment Manager.

Digital Research, USA

Generalized Executive for Realtime Multiprocessor Applications. An experimental OS for robotics systems.

Ohio State University, USA

Stadard operating system for Wordplex Word processors.

Wordplex, USA

The goal is to create a production quality micro kernel based on the latest findings in operating system research. The result will be a micro-kernel having the following features: no abstractions, safe those necessary for protection, minimal set of primitives, support for capability based security, support for resource management needed for real-time and multimedia applications.

Gemini Multiprocessing Secure Operating System. Security kernel, whi ch is the only approach yet that has succeeded in delivering the Cyber Defense Triad including mitigation of subversion and verifiability.

Essentially a fork of an earlier operating system originating on the MIT AI Lab's Lisp machines which Symbolics had used in common with LMI and Texas Instruments.

Symbolics, USA

The General Motors Research Laboratories implemented an operating system for the IBM 701. Generally considered the first operating system.

General Motors, USA

UNIX version for the NSC 32016.

National Semiconductors, USA

Operating system framework for microkernels. First conceived as the Bastei OS Architecture.

Genode Labs, Germany

Unix-like operating system developed in order to bring Gentoo Linux design, structure, and tools such as Portage and the Gentoo Linux base layout to the FreeBSD operating system.

Gentoo BSD subproject to port Gentoo features such as Portage to the OpenBSD operating system.

Provide a GNU userland managed by Portage with a NetBSD kernel.

GEneral ORGanisational Environment. Used by ICL 1900 series mainframes.

ICL, UK

Graphic Environement OS for various kinds of computers (including old 8-bit), that comes with a GUI and various office applications.

Berkeley Softworks, USA

Based on EDEN OS from Eden Group.

GeoWorks, USA

Successor of GEOS 3.0 (PEN/GEOS).

GeoWorks, USA

Free and open-source operating system for personal computers.

Unix-like operating system based on TrueOS with Xfce and MATE as its default desktop environments.

CD boot OS based on Debian GNU/kFreeBSD, which is based on Debian, GNU and the kernel of FreeBSD.

USA

Real-Time Operating System especially developed for hard real-time safety critical avionics applications.

TUBITAK Informatics, Turkey

Genetic Lifeform and Disk Operating System. Free and open-source operating system based on FreeDOS 1.0, developed as a replacement for Microsoft DOS (MS-DOS).

Corbin Davenport, USA

Based on General Motors Operating System.

General Motors, USA

GNO Multitasking Environment. Unix-like operating system for the Apple IIGS computer.

Procyon Enterprises, Devin Reade, USA

Operating system being to run on 37O architecture hardware. GNOSIS offers new approaches to solving the inherent problems of security, auditability, and reliability which are a result of the basic design of current systems.

Tymshare, USA

Also known as GNU/Hurd. Operating system and an extensive collection of computer software. GNU is composed wholly of free software, most of which is licensed under the GNU Project's own General Public License.

Unique combination of Darwin and GNU.

GNU project's replacement for the Unix OS kernel.

Unix-like OS, a project to implement a free clone of NeXTStep.

Operaing system based on the idea of building an entire Operating System from software components (based on CORBA and its ORB) that can be replaced and recycled; it also introduces an x86-specific security model based on segmentation and code scanning (an example of a no-kernel system).

Greg Law, USA

Linux distribution that Google uses internally.

Google, USA

Graphic Operating System. For Terminals.

Data Disc, USA

Aka good OS. Ubuntu-based Linux distribution.

Good OS LLC, USA

Operating system for EX860II, EX870II and EX880II general-purpose computers.

Mitsubishi, Japan

Operating system for the MELCOM EX series general-purpose computers.

Mitsubishi, Japan

Ultra securized OS for Archos' GranitePhone derived from Android.

Sikur, USA

Distributed OS with Orthogonal Persistence.

Universities of Sydney and Adelaide, Australia

Open source OS.

Chris Doman, UK

Operating system developed by Apple Computer for its Apple IIGS personal computer that uses the ProDOS filing system.

Apple, USA

Operating System for Tandem NonStop Computers, featuring high reliability.

USA