Computer firmware for emulating computer hardware; Computer hardware, namely, computers, microcomputers, IC motherboards, hard drives, magnetic optical drives, CD-ROM drives, printers, plotters, CD-recorder drives, floppy disc drives, cache random access memory controllers, computer interface controllers; Computer utility programs; Data recovery computer software; Computer operating system software; Computer firmware for copying CD/DVD discs; Personal Digital Assistants, computer hard disks, CD Rewriteable Disk Drives, Computer Printers; Computer software for web browsing on a global computer network, creating and modifying web pages, disk caching and CD-ROM caching; cache management systems, namely a controller, high and low speed digital storage memories; Computer software for emulating computer hardware; Computer software for copying CD/DVD discs; Computer software for providing computer-aided teaching at a remote computer terminal, choosing and taking courses on demand, and taking exams on a computer; Multimedia software for audio and video conferencing, broadcasting video programs and audio programs, and accessing CDs; Computer firmware for playing CD/DVD-ROM; and Computer software for connecting personal computers to the global computer network