Instrument panels for aircraft; apparatus and instruments for aircraft instrument panels and dashboards; viewfinders, holographic systems, head up display flight systems, head down displays incorporating liquid crystal display screens, gyrolaser inertial systems, flight computers, on-board computers, automatic pilots, all for aircraft; anemobarometry, radio-navigation, aeronautic flight and/or aeronautic on-board apparatus and instruments; parts and fittings for all the aforesaid goods.;