https://www.arcanoae.com/arcaos/
https://www.os2world.com/
https://hobbes.nmsu.edu/
"ArcaOS is an operating system developed and marketed by Arca Noae, LLC derived from OS/2, based on the last release by IBM. Development continues with a stated goal to add wider compatibility for more modern computing platforms, including UEFI and GPT support. It has limited PAE support and utilizing its SMP kernel, supports up to 64 physical CPUs or real CPU cores"
Because IBM are dicks and didn't allow for a Demo CD to be made I'm sharing the original 5.0 as long as possible. The open source repos with updates are available, but the proprietary bits (USB, ACPI, video drivers) are behind a paywall so no upgrades beyond the released bundle.
Burn to DVD-R or just run virtualized - booting from a USB drive came with 5.0.2 so no go..
magnet:?xt=urn:btih:6b02d811db55b953092390f73286271022836f54&dn=ArcaOS-5.0.iso&tr=udp%3a%2f%2ftracker.opentrackr.org%3a1337%2fannounce