Compact and central units for data processing, computers, processors and apparatus capable of connection thereto for input and output and for the reproduction of data and information; data processing printers for printing documents and for word processing, drafting apparatus for data processing; digital and/or analog instrumentation and control apparatus; data storage apparatus in the form of magnetic tapes, floppy magnetic disk and hard magnetic disk apparatus; drives; pocket calculators with higher mathematical functions; programmable pocket calculators and desktop printers; program modules and storage modules and extension modules; data carriers in the form of magnetic tapes, floppy disks and hard disks; all included in Class 9.;