Abstract: A printed circuit board and bulkhead assembly with I/O connectors that may be slidingly mated with a rear panel bulkhead frame of a computer chassis without removing the rear panel and without having to remove any mounting hardware. The I/O connectors are attached to the bulkhead assembly in such a manner that the I/O connectors clear the rear panel bulkhead frame when the bulkhead assembly is being slidingly mated with the rear panel bulkhead frame. The I/O connectors extend through the rear panel bulkhead frame once the bulkhead assembly is mated with the rear panel bulkhead frame. When fully installed, the bulkhead assembly and the rear panel bulkhead frame create a barrier against EMI/RFI radiation emissions escaping the computer chassis.

Abstract: A molded, expanded polypropylene mass storage mounting scheme that snugly nests a disk mechanism between a bottom part of the mounting scheme housing and a top part of the mounting scheme housing. The mass storage device mounting scheme housing has holes or depressions that are formed to snugly correspond to protruding details in the bottom cover of a computer or workstation assembly enclosure. The mounting holes and protruding details permit the mass storage mounting scheme to be smaller than the entire inside of the computer assembly and still be held securely against horizontal and rotational movement. The top and bottom covers of the computer compressively secures the mass storage device mounting scheme against vertical movement.

Abstract: A modular tray assembly for computer mass storage devices such as disk and tape drives. The assembly can be inserted through an opening in the back of a computer without requiring removal of a main computer housing cover. Power is automatically connected when the tray assembly is fully inserted into the computer. Control and data signals are connected via an external cable. Mass storage devices with removable media are accessible through an opening in the front of the computer.

Abstract: A modular adapter assembly for installing circuit boards in a computer system. The adapter assembly, with an attached industry standard circuit board meeting ISA, EISA, or MicroChannel specifications, can be inserted into a computer system through an opening in the back of the computer. The adapter assembly permits insertion and removal of circuit boards without requiring removal of a major computer housing cover and without requiring removal of attached signal cables.