Accounting	1
Agriculture	7
Antennas and waveguides	16
Astronomy	11
Automated equipment	7
Chemistry	4
Commerce	1
Communications	25
Construction	3
Cultural studies	2
Demography	3
Earth sciences	40
Economics	13
Electric traction	1
Electronics	92
Energy industry	3
Environment	1
Finances	24
General	15
Health care	12
Hobbies and pastimes	5
Human rights activism	1
Immigration and citizenship	4
Industry	4
Information technology	9
International trade	1
Labor law	1
Law	31
Life sciences	28
Magnetics	8
Marketing	4
Materials science	4
Mathematics	7
Measuring instruments	6
Mechanic engineering	14
Mechanics	1
Medical	12
Metallurgy	8
Microsoft	2
Natural sciences	7
Nuclear physics	3
Packaging	4
Patents	1
Pharmacy and pharmacology	1
Piezoelectric crystals	4
Politics	1
Power lines	2
Radio	5
Radiology	3
Satellite communications	2
Security systems	2
Semiconductors	2
Social science	2
Sound recording	1
Statistics	11
Taxes	2
Technology	13
Telecommunications	1
Telegraphy	2
Telephony	1
Textile industry	1
Transport	30
Welding	1


effective
comp., MS	efficace
med.	efficace