personal computers; microcomputers; file servers; 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; liquid crystal displays for converting portable computers to color displays; random access memory (RAM) modules; 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 all 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; computer peripheral adapters; upgrade kits comprised of 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; prerecorded magnetic diskettes for storage of warranty registration information; disk drive storage systems for personal computers, namely a chassis and enclosure which accomodates 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, diagnostic functions, operating systems, computer peripheral drivers, accessing information data bases, drive mirroring, data guarding, error logging, automatic revision tracking, automatic server recovery, program delivery and license agreement acceptance, reference utility for technical information, monitoring and controlling one or more file servers in a local area network of personal computers