5230105 Optical communication systems
5230201 Radio and television equipment
5230202 Telecommunication systems
5230203 Radar, radio navigation and hydroacoustic systems
5230204 Cinema equipment, audio and video systems
5230205 Optical communication systems
5230501 Computer technology and technology
5230502 Computer networks
5230601 Computer technology and technology
5230602 Computer networks
5230701 Automation of continuous production
