Classification
TCP - Microcomputers
7
TBH - Power electronics, rectifiers, thyristors
5
TBS - Digital electronics
4
TBC - Electronic circuits
3
TBV - Electronic devices
3
TGB - Metrology
3
TGN - Control engineering
3
TGNE - Control engineering - applications
2
TBB - Electronics - theory
1
TEB - Electrical engineering - theory
1