The MTS file system was non hierarchical, and the data model was not stream-of-bytes but rather line-numbered-record file. That said, it had some nice features, including append-only access, and program keys.
As I recall, fairly complete MTS documentation can be found at Bitsavers, and one can download a complete MTS distribution to run under emulation, see the Wikipedia article for a link.
As I recall, fairly complete MTS documentation can be found at Bitsavers, and one can download a complete MTS distribution to run under emulation, see the Wikipedia article for a link.