DR.

computer software programs for the purpose of service control and maintenance of mining, earth-handling, earth-working and construction machines and apparatuses, suitable for use in main frame computer-based systems, including on-line transmission to one computer system or another, including in the media of floppy disks and cards, magnetic tapes or cards, and laser disks and compact disks

manuals for utilization of the computer software programs for the purpose of service control and maintenance of mining, earth-handling, earth-working and construction machines and apparatuses