in reply to Is there a name for this directory format where 'foo.jpg' is in '/img/f/o/'?

G'day Cody Fendant,

I suspect the "conventional name" you're looking for is trie. It's not limited to pathnames and would be used slightly differently: .../f/fo/foo.jpg (not .../f/o/foo.jpg). Consider CPAN tarballs; e.g. https://cpan.metacpan.org/authors/id/T/TI/TIMB/DBI-1.643.tar.gz with '.../T/TI/TIMB/...'.

— Ken