Electrical apparatus for recording, transmitting and replaying audio and visual signals, namely CD-Recorders, CD-R-Recorders, CD-RW-Recorders, DVD-Recorders; computer processing units; data processors and software for use therewith; data input and output equipment, namely computer printers, graphic projection screens, keyboards, electronic drawing units, namely computer mice, trackballs, joysticks, game pads and graphic tablets, and optical scanners; blank machine readable data carriers, namely magnetic tapes, magnetic tape cassettes, magnetic storage disks, compact disks, hard disks, removable hard disks, optical storage disks, namely CD-ROMs, CD-Rs, CD-RWs, and DVDs; blank mechanical data carriers with prerecorded programming designed to copy, erase, manage, compress, de-compress and restore data; blank mechanical data carriers with prerecorded programming designed to read, inscribe and erase readable and inscribable data carriers, namely, overwritable compact disks, magnetic disks and hard disks; mechanical data carriers with prerecorded programs to make CD recordings, CD-R recordings, CD-RW recordings, DVD recordings; mechanical data carriers with prerecorded programs to prepare mechanical data carriers for formatting applications; computer programs for data processing; computer software, namely, software to copy, erase, administer, compress, decompress and restore data for inscription in mechanical data carriers; software to read, describe and erase readable and writeable and rewriteable data carriers recorded on compact disks, magnetic disks and hard drives; software to control CD Recorders, CD-R Recorders, CD-RW Recorders, DVD Recorders; software for formatting mechanical data carriers for subsequent inscription with data; operating system software; application software, namely software for audio and video recording and playback; application software designed to emulate telecommunication functions, namely telephonic, telefax, short messaging services, paging, electronic posting and e-mail for use in computers, televisions, set top boxes and data carrier networks; software for the configuration, monitoring, administration, securing and operation of data carrier networks; software for transferring data between components of data carrier networks, featuring AD/DA transfer, data compression, mistake monitoring and correction, authentication, encoding and decoding; software to ward off viruses and hacker attacks, namely firewalls; software to store and archive data; language translation software