This U.S. industry comprises establishments primarily engaged in manufacturing magnetic and optical recording media, such as blank magnetic tape, blank diskettes, blank optical discs, hard drive media, and blank magnetic tape cassettes.

Cross-References. Establishments primarily engaged in--

Mass reproducing computer software--are classified in U.S. Industry 334611, Software Reproducing; and

Mass reproducing audio and video material--are classified in U.S. Industry 334612, Prerecorded Compact Disc (except Software), Tape, and Record Reproducing.