9 Scientific measuring and teaching apparatus and instruments, in particular spectrometers, analysing apparatus in the nature of residual gas analysers, mass spectrometers, time-of-flight mass spectrometers, ion mobility spectrometers; scientific apparatus, namely, inductively coupled plasma mass spectrometers; scientific apparatus, namely, electronic ionization spectrometers; ion sources for scientific measuring and teaching apparatus and instruments, namely spectrometers, analysing apparatus in the nature of residual gas analysers, mass spectrometers, time-of-flight mass spectrometers, ion mobility spectrometers, inductively coupled plasma mass spectrometers, electronic ionization spectrometers; parts and fittings for the aforesaid goods; handling and control devices for scientific measurement and teaching apparatus and instruments, namely spectrometers, analysing apparatus in the nature of residual gas analysers, mass spectrometers, time-of-flight mass spectrometers, ion mobility spectrometers, inductively coupled plasma mass spectrometers, electronic ionization spectrometers; downloadable and recorded computer software for scientific measuring and teaching apparatus and instruments and for control and monitoring apparatus, in particular software for capturing, processing, visualizing and analyzing measurement data