Accounting	19
Agriculture	165
Antennas and waveguides	3
Art	8
Astronautics	1
Astronomy	16
Automated equipment	4
Automatic control	3
Banking	3
Biotechnology	1
Business	6
Chemistry	65
Coal	2
Commerce	23
Communications	200
Computer numerical control	2
Construction	41
Corporate governance	1
Criminal law	17
Customs	2
Demography	5
Dyalysis	1
Earth sciences	50
Economics	140
Education	30
Electric motors	1
Electric traction	3
Electricity generation	7
Electronics	113
Energy industry	20
Environment	80
European Union	5
Finances	203
Fish farming pisciculture	11
Food industry	12
Food service and catering	1
Forestry	2
General	1468
Genetics	1
Geography	3
Government, administration and public services	14
Health care	139
Hobbies and pastimes	12
Human rights activism	31
Immigration and citizenship	28
Industry	22
Information technology	100
Insurance	11
International trade	19
Labor law	35
Latin American	3
Law	183
Life sciences	15
Marketing	32
Materials science	10
Mathematics	19
Measuring instruments	1
Mechanic engineering	43
Medical	95
Metallurgy	34
Microsoft	220
Mineral products	3
Mining	1
Municipal planning	6
Name of organization	184
Natural resourses and wildlife conservation	2
Natural sciences	37
Nuclear and fusion power	1
Nuclear physics	4
Obsolete / dated	32
Oil / petroleum	2
Packaging	4
Patents	3
Pharmacy and pharmacology	31
Physical sciences	1
Piezoelectric crystals	4
Politics	154
Polymers	1
Power lines	46
Procedural law	1
Radio	2
Rail transport	2
Religion	2
Research and development	16
Scientific	5
Security systems	2
Social science	118
Sociology	5
Statistics	45
Taxes	13
Technology	11
Telegraphy	6
Textile industry	25
Trade unions	1
Transport	139
United Nations	61
Work flow	8