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personal computers; microcomputers; file servers; hand-held computers with telecommunications devices for exchanging data with other computers; electronic organizers; floppy diskette drives; hard disk drives; disk drive controllers; video monitors; video graphics controllers; back-up tape drives; blank magnetic tape cartridges; printed circuit boards; serial interface boards; combination serial and parallel interface boards; modems; computer keyboards; numeric keypads for computers; external disk drive storage cabinets with power supplies; random access memory (RAM) modules; computer network hardware, namely, network interface cards, network hubs, network routers, router chassis, network switches, network bridges, patch panels, patch cables, and numeric coprocessors; electrical connecting cables; read-only memories (ROMs); video random access memory (VRAM) modules; cache memory; memory expansion boards; central processing unit boards for upgrading personal computers; carrying cases for computers; programmed magnetic diskettes; computer user's guides and manuals sold as a unit with computers; compact disk read-only memories (CD-ROMs); compact disk read-only memory (CD-ROM) drives; rechargeable batteries; automobile electrical power adapters; battery chargers; AC adapters for computers; electrical connecting cables for computers and computer peripherals; computer pointing devices, namely, mice, pens and trackballs; docking stations for portable computers; desktop expansion bases for portable personal computers; computer peripheral adapters; upgrade kits comprises fo plug-in circuit boards and sound-producing software for adding audio capabilities to personal computers; PC cards for adding memory, modems and I/O controllers to personal computers; intelligent drive array storage devices for personal computers and servers; pen-based computers; facsimile machines; television receivers; warranty registration diskettes; disk drive storage systems for personal computers, namely, a chassis and enclosure which accommodates a plurality of hot-pluggable disk drives and includes a built-in power supply for supplying electrical power to such disk drives; computer network interface controllers; uninterruptable power supplies (UPS's); and, computer software for computer initialization and configuration, for diagnostic functions, for operating systems, for network management; for computer peripheral device drivers, for accessing information data bases, for drive mirroring, for data guarding, for error logging, for automatic revision tracking, for automatic server recovery, for program delivery and license agreement acceptance, for accessing technical information, for monitoring and controlling one or more file servers in a local area network of personal computers