Accounting	2
Acridology	1
Aeronautics	1
Agriculture	152
Animal husbandry	5
Antennas and waveguides	5
Astronautics	2
Audit	1
Automated equipment	15
Automobiles	26
Aviation	10
Bacteriology	1
Banking	3
Baseball	1
Biotechnology	1
Botany	1
Business	1
Chemical fibers	1
Chemistry	112
Cinematography	5
Coal	14
Commerce	4
Communications	141
Computer numerical control	2
Computers	2
Construction	14
Corporate governance	9
Criminal law	5
Cultural studies	8
Data processing	1
Drilling	12
Dyalysis	3
Earth sciences	85
Economics	64
Education	70
Electric machinery	4
Electric traction	3
Electricity generation	1
Electronics	238
Energy industry	30
English	1
Environment	59
Finances	36
Fish farming pisciculture	7
Fishery fishing industry	14
Food industry	35
Food service and catering	7
Footwear	2
Forestry	27
General	181
Genetics	1
Geology	8
Government, administration and public services	1
Health care	30
Helicopters	1
Hobbies and pastimes	5
Horticulture	1
Human rights activism	10
Ichthyology	1
Immigration and citizenship	2
Industry	61
Information technology	137
Insurance	1
International Monetary Fund	29
Isolation	1
Labor law	10
Laboratory equipment	4
Lasers	1
Law	41
Life sciences	41
Lighting other than cinema	3
Loading equipment	8
Marketing	2
Materials science	30
Mathematics	5
Measuring instruments	19
Mechanic engineering	62
Medical	87
Metallurgy	106
Meteorology	77
Mexican	6
Microsoft	16
Military	1
Milk production	5
Mineral products	1
Mining	2
Municipal planning	4
Name of organization	57
Natural resourses and wildlife conservation	4
Natural sciences	37
Nautical	1
Navigation	1
Nuclear and fusion power	1
Nuclear physics	22
Obsolete / dated	3
Oceanography & oceanology	1
Oil / petroleum	2
Oil and gas	1
Packaging	15
Patents	9
Pharmacy and pharmacology	2
Photography	1
Physical sciences	8
Piezoelectric crystals	1
Plastics	1
Politics	24
Power electronics	1
Power lines	1
Psychology	12
Radio	4
Radiology	1
Rail transport	1
Remote sensing	10
Research and development	3
Scientific	2
Scuba diving	1
Social science	14
Sociology	1
Soil science	3
Sound recording	1
Statistics	15
Sugar production	4
Superconductivity	5
Taxes	3
Technology	183
Telecommunications	3
Textile industry	22
Thermal Energy	9
Trade unions	1
Transformers	2
Transport	179
United Nations	54
Veterinary medicine	1
Video recording	1
Virology	2
Water resources	13
Wood processing	5
Work flow	1

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