31 : Electronics

31.020

Electronic components in general

31.040

Resistors

31.060

Capacitors

31.080

Semiconductor devices

31.100

Electronic tubes

31.120

Electronic display devices

31.140

Piezoelectric devices

31.160

Electric filters

31.180

Printed circuits and boards

31.190

Electronic component assemblies

31.200

Integrated circuits. Microelectronics

31.220

Electromechanical components for electronic and telecommunications equipment

31.240

Mechanical structures for electronic equipment

31.260

Optoelectronics. Laser equipment