05/14/2026
In the 1980s, Microsoft and IBM teamed up to build what they thought would be the future of personal computing.
It was called OS/2.
And for a while, there was a very real chance Windows might never dominate the desktop.
OS/2 was designed to completely replace MS-DOS. It was a true next-generation operating system: 32-bit architecture, preemptive multitasking, protected memory, and enterprise-level stability years ahead of consumer Windows.
While Windows 3.x and even early Windows 95 systems were famous for crashing, OS/2 machines could run for months without a reboot. Banks trusted it. Industrial systems trusted it. ATMs around the world ran on OS/2 for decades.
Then the partnership imploded.
IBM and Microsoft had a massive falling out over the future of the platform. Microsoft decided Windows was the better long-term bet and walked away to focus entirely on it. Once that happened, the software ecosystem around OS/2 began to collapse. Developers followed Microsoft. Applications followed developers. Windows became unstoppable.
IBM continued supporting OS/2 for enterprise customers until 2006, mostly because enormous industries still depended on it and replacing those systems would have cost fortunes.
Most people assumed that was the end of the story.
It wasn’t.
In 2017, a small company called Arca Noae licensed the technology from IBM and released ArcaOS, a modern continuation of OS/2.
Amazingly, it still receives updates today.
Modern USB support. Updated drivers. Better hardware compatibility. Ongoing maintenance in 2026.
Why? Because thousands of mission-critical systems still depend on software written for OS/2 decades ago, and rewriting those systems would cost millions.
Most operating systems disappear when they lose the market.
OS/2 simply refused to die.
