Electronic analogue computing installations and apparatus, electronic digital computing installations and apparatus, hybrid computing installations and apparatus, and parts and fittings included in Class 9 for all the aforesaid goods; electronic apparatus and instruments for use in the testing, setting and the like of all such installations and apparatus; electric multi-connection panels with shielded interchangeable connections; electronic amplifiers, electronic multipliers; potentiometers; electric and electro-mechanical function generators; electrically driven servo apparatus for use in or in conjunction with computing installations; cathode ray tube data display systems; digital, strip and drum recorders, electronic data processing and recording installations and apparatus, and parts and fittings included in Class 9 for all such goods; electronic symbol printers; digital recording co-ordinatographs; electronic counters, electronic ratemeters, and radiation-emitting moisture-measuring apparatus and instruments incorporating such counters or ratemeters, and parts and fittings included in Class 9 for all such goods; digital-to-analogue and analogue-to-digital converters; digital voltmeters, calculating apparatus for use in conjunction with electronic computing installations and apparatus; and capacitors.;