AdaOS

Project to create a distributed operating system in Ada.

Amoeba

a distributed operating system that is freely available via the Internet for educational and research users

Android Open Source Project (AOSP)

Base operating system used by the off-brand Android TV boxes tested.

CapROS - The Capability-based Reliable OS

CapROS is the successor to EROS. An operating system designed to provide strong application-level security and rapid recovery from failures.

Comparison of operating systems - Wikipedia

Wikipedia"s detailed comparison of computer operating systems, covering technical information, hardware support, and file systems.

JeniOS

seeks designers and programmers to contribute to te development of a new, free, UNIX-style operating system.

JOS

collaborative Java-based operating system project archive.

LWN.net - Linux Weekly News

Leading source for news and information about the Linux kernel and the free software world, featuring in-depth technical articles and discussions.

Menuet OS

downloadable OS written in assembly.

Multiuser DOS

Information, software, patches, and support for the IMS Multiuser DOS real time operating system.

MyDesktop.com

covering all aspects of Windows95/NT information, including software, reviews, tips, games, features, and support.

NewOS open source operating system

NewOS is a open source operating system with an emphasis on design and portability. It is largely implemented in C/C++, with a small amount of assembly. Full source is available.

OS News

covering alternative computing environments and technology.

OSnews - Exploring the Future of Computing

Online tech media publication featuring reviews, articles, and news on BeOS and alternative operating systems.

Parallels

Desarrollador de software de virtualización y automatización. La compañía era conocida anteriormente como SWsoft antes de renombrarse a Parallels.

Plex86.org

goal is to create an extensible open source PC virtualization software program which will allow PC and workstation users to run multiple operating systems concurrently on the same machine.

Review of Operating Systems

Review of Operating Systems

RISC OS Info

A central hub for the RISC OS community, providing software downloads, news, and resources.

The HP 3000 FAQ

Un recurso completo de Preguntas Frecuentes para el sistema informático Hewlett-Packard HP 3000 y el sistema operativo MPE.

The Open Group Base Specifications Issue 7 (POSIX.1-2017)

Official documentation for the POSIX.1-2017 standard, simultaneously IEEE Std 1003.1-2017.

VSTa

Distributed microkernel OS.

Xinu Operating System Project Page

Professor Douglas Comer"s official Xinu operating system educational design site