Data processing apparatus and computers, data input and output apparatus, in particular computer keyboards, pointer devices, joysticks; monitors, displays, cameras, loudspeakers, headphones, microphones, electronic memories, computer cards, network interface cards, modems, isdn connecting devices; wired and wireless information and data transmission units; personal digital assistants (pdas), handheld terminals and mobile phones and notebooks, communication and position-finder modules as accessory parts for personal digital assistants (pdas), handheld terminals and mobile phones and notebooks; bags for personal digital assistants (pdas), handheld terminals and mobile phones and notebooks, connecting cables for computers and components of computers, junction plugs and outlets, computer housings, recorded and recordable compact discs and floppy discs, magnetic and optical drives and memories, data processing programs