computer and parts therefor sold as a unit; computer software and downloadable computer software for CD- and DVD recording, except for file administration and file documentation; machine readable data carriers, namely, hard drives for computers, change computer hard drives, magnetic tape drives, magnetic tape cassettes, blank hard computer storage discs, blank optical discs, blank recording media with overwritable and erasable features in the nature of CD-ROM, CD-R, CD-RW, and DVD; prerecorded magnetic data carriers provided with computer programs used to read, write, burn, copy, erase, manage, compress, decompress and recondition data with programs to read, write, burn, copy and erase one or multiple overwritable machine readable data carriers; computer programs used to design labels, covers and booklets for machine readable data carriers, namely, CDs, CD-Rs, CD-RW-recorders, and DVD-recorders; computer programs used to prepare and format mechanical data carriers for the subsequent inscription of data; computer operating programs; basic input output systems software, computer software for the configuration, monitoring, management, securing and operation of data transfer networks including AD/DA conversion, data compression, monitoring and correction of errors, authentification, encoding and decoding; computer software for defense against computer virus and hacker attacks; computer software for data storage and data archiving excluding file administration and file documentation