Education

AcadOS

cs.uiowa.edu

Academic Operating System, goals: to expose students to more modern ideas than older OSs, to basic OS mechanisms, to OS and language design and prototyping; old version, ideas for …

41 visits May 3, 2026 Details

Amateur OS: AMOS

scottie.20m.com

Scott Billingsley's OS: realtime for DSP and amateur radio, one user/application, 16-bit real mode, for i386+, FAT 12/16; no TSRs, library of routines to program into apps, minimal…

181 visits Apr 20, 2024 Details

KOS

kos.enix.org

Kid Operating System. Modular (run-time dynamic linking), preemptive multitasking, to have SVR4-like VM. Begun 1998 by young programmers, most of them students. Goal: not obtaining…

51 visits Jun 3, 2023 Details

NACHOS

cs.washington.edu

Not Another Completely Heuristic Operating System: teaching OS coded in C++ subset, developed at UC Berkeley for OS and Systems Programming classes; now used worldwide. Description…

466 visits Jun 16, 2025 Details

Nachos/486

cs.virginia.edu

Port, extension of instructional OS, now stand-alone, protected mode, multithreaded, compiles in FreeBSD to run on i486+, can be relinked without recompile. Descriptions, report (H…

147 visits Dec 7, 2025 Details

RCOS

cq-pan.cqu.edu.au

Ron Chernich's OS: computer learning tool animates operation of multi-tasking OS; true OS, runs programs; object-oriented, message passing kernel lets parts be replaced easily, C++…

463 visits Dec 10, 2024 Details

ShawnOS

overwhelmed.org

Sure as Hell Ain't Windows Ninety five, the corner cutting OS due to the original schedule. Always intended more as a learning experience for author and others than as a practical,…

86 visits May 27, 2025 Details

SunriseOS

geocities.com

Tiny operating system written in Assembly, via NASM, by ICT student. Meant for only fun and learning. [Open Source]

358 visits Feb 5, 2024 Details

Topsy

tik.ee.ethz.ch

Teachable Operating System: tiny multithreaded messaging microkernel, in ANSI C; protected threads, memory managed, and thread/process control. From undergraduate course on concurr…

194 visits Jan 8, 2025 Details

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