ReactOS, the open-source operating system aiming to clone the functionality of Windows NT, celebrates 30 years since its inception in 1996. Originally branching out from the unsuccessful FreeWin95 project, ReactOS has evolved significantly, setting notable milestones in its path of development.
The early days saw the project struggling to find its footing until the release of version 0.1.0 in 2003, which introduced basic CD boot functionality. Subsequent 0.2.x versions marked a major leap with the introduction of desktop support. Version 0.3.x brought networking capabilities and SATA support, despite temporary delays caused by an intellectual property audit.
Since 2016, the 0.4.x versions have enhanced the shell interface and integrated WinDbg debugging support, showcasing the project’s progress in mimicking Windows operating systems. Looking ahead, the future development roadmap includes plans for new NTFS and ATA drivers, symmetric multiprocessing (SMP) support, compatibility with UEFI systems, and WDDM GPU drivers.
Throughout its three-decade journey, ReactOS has amassed an extensive repository, with 88,198 commits made by 301 contributors and nearly 15 million lines of code. The dedication to providing binary compatibility with Windows applications and drivers remains steadfast, underscoring its mission to offer a fully open-source alternative to Windows.
As ReactOS looks towards the future, the project continues to aspire towards achieving greater compatibility and functionality, maintaining its vision of being a viable open-source solution for Windows users.

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ReactOS marks 30 years since its 1996 inception as an open-source Windows NT clone. The project evolved from basic CD boot functionality in 2003 to desktop support, networking, SATA capabilities, and enhanced shell interfaces. With 88,198 commits from 301 contributors and nearly 15 million lines of code, the project's roadmap includes NTFS drivers, SMP support, UEFI compatibility, and WDDM GPU drivers while maintaining binary compatibility with Windows applications and drivers.

Reflecting on 30 Years of ReactOS: An Open-Source Windows Implementation Journey

I heard React and OS and are glad that it’s not what i thought 😂
Also cool project!

I lost track of this back in 2010, nice to see it’s still going for those who enjoy it :)

please keep in mind the name has ctOS in it …