[Oberon] filesystem with directories ?

[Brantley Coile]

http://cm.bell-labs.com/sys/doc/venti.pdf

>> "What git offers is a content-addressable object filesystem. If you
>> store a file in git, it does not really have a name; instead, it can
>> be looked up using its contents (as represented by an SHA hash). A
>> hierarchical grouping of files - a particular kernel release, for
>> example - is represented by a separate "tree" object listing which
>> files are part of the group and where they are to be found. Files do
>> not have any history - they simply exist or not, and two versions of
>> the same file are only linked by virtue of being in the same place in
>> two different tree objects."