From the "wtf?" department...

[chaobell]

In order to create a basic Rescue Disk set for your system, label 7 floppy disks as follows:

Basic Rescue Boot Disk
Norton Antivirus Program Disk
NAV Definitions Disk 1
NAV Definitions Disk 2
NAV Definitions Disk 3
NAV Definitions Disk 4
NAV Definitions Disk 4

No, this is not a typo.

I've taken to labeling one disk "4" and one "4.5."