storage disk arrays featuring magnetic, optical and magneto-optic disk drives, and electrical and mechanical interconnect for such drives; computer hardware for digital tape backup; computer software for managing and controlling storage disk arrays and digital tape backup; data storage media controller boards, namely, printed circuit boards and electrical/electronic components thereon; plug-in data storage subsystems featuring electrical and mechanical interconnect with media drives, namely, disk drives and tape drives, controllers and bus interface chips; bus interface chips, namely, integrated circuit chips; application-specific integrated circuits; computer network controller integrated circuits; host computer adapter boards, namely, printed circuit boards and electrical/electronic components thereon; storage media computer hardware; computer software for managing and controlling the operation of optical juke boxes; computer network management utilities software; computer software drivers, namely device drivers; and utilities software for use with the above products, and user manuals sold with the computer and utilities software