- 31.020 Electronic components in general
- 31.040.01 Resistors in general
- 31.040.10 Fixed resistors
- 31.040.99 Other resistors
- 31.060.01 Capacitors in general
- 31.060.10 Fixed capacitors
- 31.060.20 Ceramic and mica capacitors
- 31.060.30 Paper and plastics capacitors
- 31.060.40 Tantalum electrolytic capacitors
- 31.060.50 Aluminium electrolytic capacitors
- 31.060.60 Variable capacitors
- 31.060.70 Power capacitors
- 31.060.99 Other capacitors
- 31.080 Semiconductor devices
- 31.080.01 Semiconductor devices in general
- 31.080.99 Other semiconductor devices
- 31.120 Electronic display devices
- 31.140 Piezoelectric devices
- 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
- 31.220.01 Electromechanical components in general
- 31.220.10 Plug-and-socket devices. Connectors
- 31.220.99 Other electromechanical components
- 31.240 Mechanical structures for electronic equipment
- 31.260 Optoelectronics. Laser equipment
           Last updated: 12/5/2001