Description of files found in .../NetBSD-1.4/i386/binary/sets:

This directory contains the gzip compressed tar files of the binary
distribution. The contents of these files are described fully in the
INSTALL document. Note that you may use the unsplit versions in your
installation with the supplied tools if you wish.

The Split/ directory contains split versions of these same files.
These are provided to permit installation from floppy disks for those
with no other means of installation.  See INSTALL for details. Note
that this method of installation is extremely laborious and not
recommended if any other alternative exists.

Note that the binary distribution of security related software is
contained elsewhere in a parallel directory on those distribution
sites that have it. If you are in a place where you can legally get it
(i.e. the United States), you should get and install the security
software, too. See INSTALL and the numerous README.export-control
files for details.

Every directory contains several checksum files (BSDSUM, CKSUM, MD5, &
SYSVSUM) that contain checksums of all the other files made with the
cksum(1) utility. The MD5 checksums made with "cksum -m" are
considered the "safest", followed by the CKSUM POSIX-style checksums
made with the plain "cksum" command. Please check the integrity of
your distribution against one of these sets of checksums if
possible. The BSDSUM and SYSVSUM files contain checksums made with the
historical BSD and System V checksum utilities and are provided for
those with no other checksum utilities available.