Aegis/Exo-kernel (Massachusetts Institute of Technology)
Group Members: Frans Kaashoek, Dawson Engler
The Aegis kernel is built around the idea of an exo-kernel. An evolution from micro-kernels, exo-kernels export a virtual machine that securely multiplexes resourses among mutually distrusting applications. The exo-kernel philosophy tries to export as few abstractions besides the basic hardware abstractions as possible, and to implement as little policy in the kernel as possible. Like SPIN, Aegis relies on techniques such as downloading code into the kernel to make the system fast.

AIOS (outdated )
The AIOS project is aimed toward developing a new computer operating system based on artificial intelligence.

Alpha Kernel(outdated)

(Carnegie Mellon University) Group Members

Amiga OS  (outdated)
Amiga is a proprietary computer system introduced in 1985, built around the Motorola 68k processor line (and lately around the Motorola PowerPC CPU as well) featuring a modern multitasking OS and probably the most avid following of any computer system around.Its kernel was designed and implemented by  Carl Sassenrath. It has been plagued by mismanagement and due to this several bankruptcies along the way, making for a real rollercoaster ride for any fan. Currently the Amiga technology is in the hands of Gateway (formerly Gateway 2000), handled by the fully owned daughters Amiga Inc. and Amiga International, and is set for a comeback with an updated OS appearing in 1999. You can find a comprehensive archive of Amiga related links and information at the Amiga Web Directory, more news and user group information at Amiga.org and of course at the home of the Amiga, Amiga Inc.. 
(The Amiga RC5 Team Effort) 

s.a. 
AMOS  
KOSH 
 

AMOS  (Amiga OS - Freeware)(outdated) 
Europress Software Ltd 
Clickteam provides the source code of STOS and AMOS as a courtesy to the Atari ST and Amiga computer community. You are allowed to edit and modify the source code, add new features, remove sections of code and recompile it to produce modified final products. 
Any product made from the original source code should contain this written notification: 
"Contains parts of AMOS (or STOS) source code, originally written by François Lionet and published by 
Europress Software Ltd. Contact the original authors at www.clickteam.com." 

 

Amoeba

(Vrije Universiteit)
Amoeba is a powerful micro-kernel-based system that turns a collection of workstations or single-board computers into a transparent distributed system. It has been in use in academia, industry, and government for about 5 years.

The Amoeba Distributed Operating System  runs on the SPARC (Sun4c and Sun4m), the 386/486, 68030, and Sun 3/50 and Sun 3/60. 

At the Vrije Universiteit, Amoeba runs on a collection of 80 single-board SPARC computers connected by an Ethernet, forming a powerful processor pool. This equipment is pictured below. It is used for research in distributed and parallel operating systems, runtime systems, languages, and applications. 

developed by Andrew Tanenbaum 
 
Andrew S. Tanenbaum, Robbert van Renesse, Hans van Staveren, Gregory J. Sharp, Sape J. Mullender, Experiences with the Amoeba distributed operating system, Communications of the ACM, Vol. 33, No. 12 (Dec. 1990), Pages 46-63
 

Angel (City University of London)
Angel is designed as a generic parallel and distributed operating system, although it is currently targeted towards a high-speed network of PCs. This model of computing has the dual advantage of both a cheap initial cost and also a low incremental cost. By treating a network of nodes as a single shared memory machine, using distributed virtual shared memory (DVSM) techniques, we have addressed both the needs for improved performance and provided a more portable and useful platform for our applications.

ANT (Actor Network Theory)  ANT Resource Bibliography 

Michel Callon, Bruno Latour,  John Law 

Bloomfield, B. P. (1991). "The role of information systems in the UK National Health Service: Action at a distance and the fetish of calculation." Social Studies of Science 21(4): 701-734. (Case study that used ANT ideas to describe the politics of information technology to change the NHS. ) 

Bloomfield, B. P. and T. Vurdubakis (1994). "Boundary disputes: Negotiating the boundary between the technical and the social in the development of IT systems." Information Technology & People 7(1): 9-24. (Uses ideas of actor network theory to explain the continuous renegotiation between the social and the technical when information technology systems are designed. ) 

Bowers, J. (1992). The politics of formalism. In M. Lea (Ed.) Contexts of Computer-Mediated Communication. Hemel Hampstead, Harvester Wheatsheaf: 232-261. (Draws on ANT to describe the inherently political nature of artefacts, especially information technologies. Also a useful introduction to ANT concepts such as immutable mobiles, obligatory passage ponts, etc. ) 

Brown, J. S. and P. Duguid (1994). "Borderline issues: Social and material aspects of design." Human-Computer Interaction 9(1): 3-36. (Key paper of special issue on Context in Design. Uses ANT only marginally but gives an critical review of similar theoretical approaches to the social, material and political aspects of information technologies. ) 

Escobar, A. (1994). "Welcome to cyberia: Notes on the anthropology of cyberculture." Current Anthropology 35(3): 211-231 (Uses ANT concepts (and a range of other theoretical traditions) to develop an anthropology of cyberculture. ) 
 
 

Apertos (Sony Computer Science Lab)

Apple 
     Steven Wozniak 
     Steven Jobs 
     Apple I 
     Apple II 
     Lisa & MacIntosh 

AROS  

 

Atari OS (outdated)
 

Athena Operating System
Object-oriented, customizable operating system developed by Rocklyte runs on Windows, Macintosh, Linux and consumer devices. View screenshots.

AtheOS
Official site of Athe OS. Browse resources for available software, bug listings, documentation and available software.

All about OSs