ArcaOS

ArcaOS is a proprietaryoperating system based on OS/2, developed and marketed by Arca Noae, LLC under license from IBM. It was first released in 2017 and builds on OS/2 Warp 4.52 by adding support for new hardware, fixing defects and limitations in the operating system, and by including new applications and tools, and includes some Linux/Unix tool compatibility. It is aimed at users who need to run existing OS/2 applications on current hardware.

Like OS/2 Warp, ArcaOS is a 32-bit, single-user, preemptive multitasking operating system for the x86 architecture, with support for symmetric multiprocessing; it can run on physical hardware or in a virtual machine.