The case a Cadmus machine was sold in gave the first number of its designation. Over time, Cadmus developed a few types of cases:

• The 9200 series case consists of two stacked boxes and was only sold with the 68010-based /1 processor board. The top box probably contained the CPU board (I've never seen a 9200 in reality...), while the bottom one holds the QIC-based streamer and probably the disks:
  

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  Apart from a key-powerswitch, each case has a a green and a red button with integrated lamps. The red lamp blinks if the system lost power when turned on; you have press the red button to acknowledge this and turn off the blinking.

• The 9600 series case is similar to a PC-style tower case (though much deeper...) and was very popular for workstations. The Q-Bus crate is large enough to hold a CPU with one or two boards, one or two graphics/multi-serial board, up to two memory cards and an ICC I/O controller. The mass storage devices (one accessible device at the front, either a floppy or tape drive, and a 5.25-inch hard disk behind it) are located in a separate, closed metal box which may be removed by loosening three screws and unplugging two cables for SCSI and power. The power supply consists of a base module and an optional extension that was necessary for non-diskless systems:
  

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  Keylock and switches are the same as for the 9200 case. The foot may be removed and the whole case turned 90 degrees to use the case as a - sort of - desktop. One may also remove the outer plastic parts completely and fit the metal core case into a 19 inch rack.

• The 9700 resp. 9900 cases were designed for servers or machines with a real lot of serial ports. The case is more than two times as wide as a 9600, which gives you the opportunity of having both a floppy and streamer in one case. The Q-Bus crate also had more slots, which was important if you needed several serial boards for a multi-terminal machine. The 9900, which has an additional "base", was especially well suited for this purpose because this base had space for many RS232 sockets and allowed to nicely hide the plug mess behind a cover. Of course, this case was also the choice if you had some 8 inch SMD disks to place somewhere - the wheels were definitely needed for an average 9900...
  

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  PCS claimed that a 9700 resp. 9900 without the additional case could also be used as a desktop placed on a table. The 9900 however almost would make a table itself :-)