>"The very first hierarchical file system was developed for Multics. It is described in the paper A General-Purpose File System For Secondary Storage (1965) by

>"The very first hierarchical file system was developed for Multics. It is described in the paper A General-Purpose File System For Secondary Storage (1965) by Robert C. Daley and Peter G. Neumann. There are several things that I find astounding about this paper: There were apparently no hierarchical file systems before Multics. The references do no cite any previous work on this and I haven’t found any." (PDS: As an amateur computer historian, I'd be interested in this myself, if there existed any hierarchical file system before Multics, or if one was conceived in any academic paper before the one cited...) [...] >"Directory entries that point to secondary storage. This is a game changer for file system management. More on this below." (PDS: Which, to this day, is one of the great abstractions, one of the great ideas, in computing!)