Abstract: The slim optical disk drive-mounting bracket allows anyone to install two slim optical disk drives into a 5.25-inch desktop, tower or rack mount model computer chassis drive bay. Definition List 1 Term Definition Chassis Pronounced “CHA-see.” Also called case, a metal frame that serves as the structural support for electronic components. Every computer system requires at least one chassis to house the circuit boards and wiring. Tower Refers to a computer chassis in which the power supply, motherboard, and mass storage devices are stacked on top of each other in a cabinet or tower. Rack Mount Refers to a computer chassis that can be installed into a rack. Drive Bay An area of reserved space in a personal computer where hard or floppy disk drives (or tape drives) can be installed. The number of drive bays in a computer determines the total number of internal mass storage devices it can handle.