This U.S. industry comprises establishments primarily engaged in manufacturing computer storage devices that allow the storage and retrieval of data from a phase change, magnetic, optical, or magnetic/optical media. Examples of products made by these establishments are CD-ROM drives, floppy disk drives, hard disk drives, and tape storage and backup units. Manufacturing blank magnetic and optical recording media--are classified in U.S. Industry 334613, Magnetic and Optical Recording Media Manufacturing; Manufacturing semiconductor storage devices, such as memory chips,--are classified in U.S. Industry 334413, Semiconductor and Related Device Manufacturing; Manufacturing drive controller cards, internal or external to the storage device--are classified in U.S. Industry 334418, Printed Circuit Assembly (Electronic Assembly) Manufacturing; and Manufacturing other parts, such as casings, stampings, cable sets, and switches, for computer storage devices,--are classified in the Manufacturing sector based on their associated production processes.