BeOS

BeOS is a discontinued operating system for personal computers that was developed by Be Inc.[2] It was conceived for the company's BeBox personal computer which was released in 1995. BeOS was designed for multitasking, multithreading, and a graphical user interface. The OS was later sold to OEMs, retail, and directly to users; its last version was released as freeware. Early BeOS releases are for PowerPC. It was ported to Macintosh and then x86. Be was ultimately unable to achieve a significant market share and ended development with dwindling finances, so Palm Inc acquired the BeOS assets in 2001. Enthusiasts have since created derivate operating systems including Haiku, which retains BeOS 5 compatibility. https://en.wikipedia.org/wiki/BeOS

lots of MetaData in the File System

initially designed with Multimedia focus