nbfs —
NetBSD boot filing system for RISC OS
nbfs is a filing system, implemented as a RISC OS
  relocatable module, to allow read-only access to
  NetBSD file systems from RISC OS. It supports reading
  FFSv1, FFSv2, LFSv1, and LVSv2 partitions from disks supported by
  FileCore-based filing systems such as ADFS.
Pathnames on nbfs follow RISC OS
    conventions, as described in the various RISC OS User
    Guides. The underlying FileCore instance used by
    nbfs is selected by the filing system's special
    field, while the disk and NetBSD partition are
    selected by the disk name. Thus, to refer to the first
    NetBSD partition of the first ADFS hard disk, one
    would use NBFS#ADFS::4a. RISC OS file names are
    generated from NetBSD file names by replacing
    ‘/’. Files whose names contain
    characters not allowed in RISC OS file names are not accessible through
    nbfs. Thus, as a full example, the file
    /etc/resolv.conf on the partition mentioned above
    would be referred to as
    NBFS#ADFS::4a.$.etc.resolv/conf.
acorn32/boot32(8)
RISC OS 3.7 User Guide,
    Acorn Computers Ltd,
    Cambridge, January
    1997.