Categories of components The most commercialized product 

categories :

Electronic tubes (emission-reception, radar, microwave, Geiger Muller counters, ...)

Semiconductors : Diodes, transistors, triacs, thyristors, logic and analog circuits, microprocessors, darlington and IGBT power modules, ...Passive components: resistors, capacitors, inductors, quartz and oscillators, relays, switches, connectors ...