Accounting	5
Agriculture	176
Analytical chemistry	29
Antennas and waveguides	17
Architecture	4
Art	3
Astronautics	10
Astronomy	100
Automated equipment	129
Automatic control	8
Banking	6
Basketball	2
Biology	4
Building structures	3
Business	78
Chemistry	139
Chess	2
Coal	54
Commerce	42
Communications	577
Computer numerical control	6
Computers	105
Construction	510
Criminal law	22
Cultural studies	81
Customs	11
Data processing	1
Demography	17
Dyalysis	2
Earth sciences	203
Ecology	5
Economics	302
Education	67
Electric machinery	3
Electric motors	1
Electric traction	8
Electrical engineering	6
Electricity generation	27
Electronics	627
Employment	3
Energy industry	46
Environment	189
European Union	107
Fencing	1
Finances	861
Fish farming pisciculture	38
Food industry	3
Football	2
Gear train	1
General	1577
Glass production	1
Government, administration and public services	50
Gymnastics	12
Health care	132
High energy physics	33
Hobbies and pastimes	16
Human rights activism	16
Immigration and citizenship	58
Industry	79
Information technology	649
Insurance	235
International law	4
International Monetary Fund	122
International trade	18
Investment	1
Isolation	1
Kayaking	1
Labor law	146
Labor organization	1
Law	5964
Life sciences	107
Lighting other than cinema	1
Machinery and mechanisms	1
Magnetics	3
Marketing	183
Materials science	45
Mathematics	26
Measuring instruments	27
Mechanic engineering	147
Mechanics	3
Medical	297
Medical appliances	9
Metallurgy	213
Meteorology	1
Microsoft	39
Mineral products	6
Municipal planning	14
Natural resourses and wildlife conservation	45
Natural sciences	48
Nuclear and fusion power	3
Nuclear physics	36
Obsolete / dated	10
Packaging	3
Patents	308
Pharmacy and pharmacology	25
Physical sciences	8
Physics	2
Piezoelectric crystals	2
Politics	105
Power electronics	1
Power lines	6
Power system protection	17
Private international law	8
Procedural law	55
Radiation	76
Radio	6
Rail transport	4
Reliability	2
Religion	5
Research and development	3
Road works	1
Scientific	23
Scuba diving	1
Security systems	9
Semiconductors	6
Social science	52
Sociology	2
Sound recording	4
Speed skating	2
Sports	2
Statistics	126
Swimming	3
Taxes	41
Technology	681
Telecommunications	13
Telegraphy	3
Tennis	1
Textile industry	5
Thermal Energy	7
Trade unions	2
Transformers	4
Transport	903
Travel	1
United Nations	2
Ventilation	1
Video recording	1
Volleyball	2
Water polo	1
Work flow	40
Wrestling	7

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