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ReactOS™ Version 0.4.x
Updated January 20, 2021
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1. What is ReactOS?
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ReactOS™ is an Open Source effort to develop a quality operating system that is
compatible with applications and drivers written for the Microsoft® Windows™ NT
family of operating systems (NT4, 2000, XP, 2003, Vista, Seven).

More information is available at: https://reactos.org/


2. Relationship with the WINE project
-------------------------------------

ReactOS has always intended to work with the WINE project to share as much
programming effort as possible. This mainly concerns User Mode DLLs and
still happens to a degree today. Other areas of cooperation lie in
applications and testing suites.


3. Future compatibility
-----------------------

The ReactOS project, although currently focused on Windows Server 2003
compatibility, is always keeping an eye toward compatibility with
Windows Vista and future Windows NT releases.


4. Supporting other System Applications
---------------------------------------

The Windows NT architecture allows for subsystems, as does the ReactOS
architecture. A subsystem is an implementation of the APIs of another
operating system, allowing ReactOS to run applications from other systems.
We are already looking at subsystems for: Java, OS/2, and DOS and possibly
others in the future.


5. Is ReactOS legal?
--------------------

Yes we are.
All the code of ReactOS has been written from scratch by our developers.
We go to great lengths to ensure that the code our developers create is clean,
same applies to the variety of methods we use to understand Windows internals,
including clean room reverse engineering, using existing documentation freely
available both in books and on the web, using extensive tests (tens of millions)
which apply black box engineering methods against both public and private APIs
exposed by the operating system.


6. Tutorials
------------

Developer and User Tutorials: https://reactos.org/wiki

The tutorials contain more information on the project, compiling and testing
ReactOS - amongst other topics. Contributors to the project are always welcome.


7. Frequently Asked Questions
-----------------------------

Some of your questions may be answered in: https://reactos.org/faq/
In addition, the ReactOS forum: https://reactos.org/forum/ may contain
complementary, yet non-official, information.


8. Authors and Credits
----------------------

Aleksandar Andrejevic
Aleksey Bragin
Alex Ionescu
Alexander Shaposhnikov
Amine Khaldi
Andrew Greenwood
Andrey Korotaev
Art Yerkes
Benedikt Freisen
Brandon Turner
Brian Palmer
Cameron Gutman
Casper Hornstrup
Christoph von Wittich
Colin Finck
Daniel Reimer
David Quintana
David Welch
Dmitry Chapyshev
Emanuele Aliberti
Eric Kohl
Filip Navara
Ged Murphy
Gé van Geldorp
Giannis Adamopoulos
Gregor Anich
Gregor Brunmar
Gunnar Dalsnes
Hermès Bélusca-Maïto
Hervé Poussineau
Jaix Bly
James Tabor
Jason Filby
Jeffrey Morlan
Jens Collin
Jérôme Gardou
Joachim Henze
Johannes Anderwald
Kamil Hornícek
Katayama Hirofumi MZ
KJK::Hyperion
Klemens Friedl
Maarten Bosma
Magnus Olsen
Marc Piulachs
Mark Jansen
Martin Fuchs
Matthias Kupfer
Michael Wirth
Mike Nordell
Mindflyer
Nathan Woods
Peter Hater
Peter Ward
Pierre Schweitzer
Rex Jolliff
Robert Dickenson
Royce Mitchell III
Saveliy Tretiakov
Stanislav Motylkov
Stefan Ginsberg
Sylvain Petreolle
Thomas Blümel
Thomas Faber
Timo Kreuzer
Vadim Galyant
Vizzini
Wierd_W
Z98

Further thanks go to all Contributors and the Wine Team