It's a 250 MB External Zip Disk Drive Portable
This is a Thermal Conduction Module from an IBM 3090. This is a water cooled unit that holds loads of chips.
The M6-640 is the highest performance personal computer workstation in the Suprema range with multimedia, document imaging and communications capabilities. It has a 90MHz Pentium processor with 256Kb of secondary cache. It can accommodate up to 128Mb RAM and supports hard disks of up to 1Gb through an IDE interface.
Disk Interface for a disk cabinet.
It's a disque PC IDE 850 Mbytes.
It has a storage capacity of 200 Mb.
A diode matrix is an extremely low-density form of read-only memory. It's one of the earliest forms of ROMs (dating back to the 1950s). Each bit in the ROM is represented by the presence or absence of one diode. The ROM is easily user-writable using a soldering iron and pair of wire cutters.This diode matrix board is a floppy disk boot ROM for a PDP-11, and consists of 32 16-bit words. When you access an address on the ROM, the circuit returns the represented data from that address.
There is a floppy disk on it.
The IBM 3000 is an information recorder which was used for data collection. The data were collected by being punched directly onto IBM cards.