https://arstechnica.com/gadgets/2020/06/a-decidedly-non-linux-distro-walkthrough-haiku-r1-beta2/

Earlier this month, the Haiku project released the second beta of its namesake operating system, Haiku.

Haiku is the reimagining of a particularly ambitious, forward-looking operating system from 1995—Be, Inc.'s BeOS. BeOS was developed to take advantage of Symmetrical Multi-Processing (SMP) hardware using techniques we take for granted today—kernel-scheduled pre-emptive multitasking, ubiquitous multithreading, and BFS—a 64-bit journaling filesystem of its very own.