The HP4952A analyzer has a 3.5" floppy disk drive.
It ships with a plastic drive-head-protector!
Disks use the "LIF" format common on Hewlett-Packard systems. This is a different disk format than DOS, but there are good utilities for working with LIF disks and images.
There are two versions of the LIF utilities,
This directory contains disk images copied from various archive sources (HP Computer Museum, bitsavers), and application and data files extracted from those images (using the extended lifutils). All these are copyright (c) by Hewlett Packard Co.