OS9's file system was actually very similar to modern OS X (earlier incarnations of HFS). So it's an abstraction of a standard directory hierarchy, albeit a ver

OS9's file system was actually very similar to modern OS X (earlier incarnations of HFS). So it's an abstraction of a standard directory hierarchy, albeit a very elegant and disciplined one. The major difference under the hood was the presence of resource forks for various kinds of metadata and UI (icons, for example).