An open source operating system for X86 architecture. It also contains documents, specifications explaning various hardware.

Tutorial for writing an operating system and links to group members' projects.

OS development information and tutorials. Links.

How to write a bootstrapper.

Old non-updated mirror online library covering a plethora of OS development topics. Datasheets, tutorials, reference manuals and hardware programming information.

A course in operating systems with a focus on the design and construction of a modern OS kernel.

Links to many operating systems journals on the web.

Developed by Richard Hayden, also containing information on low-level systems and operating system programming, forums.

An open source os written in Turbo C (for DOS/ windows) and nasm (Windows/Dos/Linux) as well as two exclusive tutorials on how to write an operating system.

Interactive tutorial about message passing, semaphores, and monitors.

Course details and material.

Tutorial on operating system development leading to the development of a real mode single tasking operating system developed in assembler.

News and reviews of kernels.

Resources for programmers new to kernel hacking. Example code, FAQs, utilities for debugging modules.

Open source operating system, planned to be an OS entirely made by Portuguese people and built mainly as a way of self-learning and research on operating systems development. [Open source]

A list of educational and experimental operating systems aiming to help developers who are looking for code examples.

Notes on operating system theory, source code of describing actual construction of operating system in C programming language. Also OS construction related links to books, notes, tutorials, and news groups.

Contains sources of a minimal kernel, a new CPU scheduler for Linux, multithreading in Linux, systems software in DOS and collection of good reference material for OS lovers.

A web portal dedicated to operating system development, attracting programmers into an advanced development environment.

A resource center for PC operating system developpers. The aim is to provide reliable documents about software and hardware standards under the aspect of official specifications as well as more friendly documents.

By William Jolitz and Lynne Jolitz (authors of 386BSD OS). Good book to learn the kernel internals of 386 architecture operating systems.

Index of operating systems and links to resources for programmers.

Extensive information about booting, file systems, memory, architecture, and interfacing with other devices.

An open source set of libraries that can be used as building blocks for an operating system for x86. Includes documentation and publications.

A site containing archived documents relating to the programming of Operating Systems.

Ukrainiann Operating System. OS sources, toolkit downloads. OS development related articles.

Information on writing your own operating system, protected mode, and small independent OS projects with freely-available source code.

Notes and example code for basic operating systems concepts, threads, sockets, and device drivers.

Extensive discussion of virtual memory.

Memory allocation and multitasking algorithms. Programming Interrupts for DOS (docs and examples). Devices programming (PIC, PIT, FDC, IDE, KEYBOARD) source code and links. Utilities.

The Hobbyist guide to writing your own operating system from the ground up, Question and Answer style on everything from PMode to filesystems to GCC and doing it in C++.

Directory of OS development related resources.

A project of developing new object oriented operating system.