BeOS is a discontinued, proprietary operating system developed by Be Inc. in the 1990s, built from the ground up for digital multimedia, real-time audio and video processing, and high-performance multitasking.

It is shame that many like that multimedia ones were discontinued, there are new ones alternatives made, anyway, it would be good that many of these could be also used in virtual macines, but some glith even in that way when used, today, virtual box and vmware are best, but there are also other ones that dont handle well when you install older ones like BeOS, because these need more work when used in direct boot way, some operating systems are wiped from time i will not even mention, but it would be good to restore them from ashes like phenix..