Accounting	80
Accumulators	5
Acoustics	10
Acridology	15
Aerohydrodynamics	3
Aeronautics	16
Agriculture	3127
Alcohol distilling	1
Ammunition	1
Animal husbandry	154
Antennas and waveguides	64
Architecture	1
Armored vehicles	9
Art	75
Artillery	34
Astronautics	38
Astronomy	2
Automated equipment	237
Automatic control	41
Automobiles	576
Aviation	213
Aviation medicine	1
Bacteriology	2
Ballistics	2
Banking	79
Baseball	104
Beekeeping	1
Beverages	1
Biochemistry	1
Bioenergy	1
Biology	13
Biotechnology	36
Book binding	2
Botany	112
Brewery	4
Business	50
Cartography	5
Ceramics	3
Chemical fibers	16
Chemistry	880
Cinematography	1
Climatology	9
Coal	212
Commerce	239
Communications	2134
Computer networks	1
Computer numerical control	38
Computers	83
Construction	360
Corporate governance	113
Criminal law	173
Cultural studies	105
Customs	37
Data processing	32
Deafblindness	10
Demography	85
Drilling	107
Drives	1
Dyalysis	46
Dyes	20
Earth sciences	830
Ecology	22
Economics	2279
Education	693
Electric machinery	9
Electric motors	23
Electric traction	15
Electricity	15
Electricity generation	7
Electrochemistry	5
Electronics	2157
Employment	12
Energy industry	277
Engines	8
English	2
Entomology	670
Environment	2032
European Union	8
Explosives and Explosive Ordnance Disposal	5
Fat-and-oil industry	3
Finances	3129
Fish farming pisciculture	388
Fishery fishing industry	111
Food industry	197
Food service and catering	86
Footwear	25
Forestry	256
Gardening	5
General	9111
Genetics	60
Geography	35
Geology	4
Geometry	1
Glass production	1
Government, administration and public services	52
Health care	1520
Helicopters	8
Hobbies and pastimes	126
Horticulture	25
Human rights activism	411
Hydrology	19
Hygiene	3
Ichthyology	7
Idiomatic	1
Immigration and citizenship	207
Industry	1200
Informal	1
Information technology	1121
Insurance	241
International law	50
International Monetary Fund	1670
International trade	94
Internet	42
Investment	8
Isolation	6
Jet engines	1
Knitted goods	9
Labor law	346
Labor organization	4
Laboratory equipment	11
Lasers	4
Latin American	5
Law	3541
Leather	19
Librarianship	30
Life sciences	808
Lighting other than cinema	9
Loading equipment	50
Logistics	4
Machine tools	3
Magnetics	22
Mammals	1
Marketing	421
Materials science	320
Mathematics	588
Measuring instruments	258
Mechanic engineering	853
Mechanics	20
Medical	3791
Medical appliances	1
Metallurgy	954
Meteorology	916
Mexican	15
Microbiology	4
Microelectronics	1
Microsoft	512
Military	91
Milk production	39
Mineral products	29
Mining	5
Municipal planning	56
Name of organization	2544
Natural resourses and wildlife conservation	140
Natural sciences	1236
Nautical	47
Navigation	15
Navy	3
Nuclear and fusion power	23
Nuclear physics	148
Obsolete / dated	182
Obstetrics	1
Oceanography & oceanology	3
Oil / petroleum	20
Ophthalmology	8
Packaging	471
Patents	1608
Pest control	403
Pets	3
Phaleristics	1
Pharmacy and pharmacology	136
Philately / stamp collecting	1
Photography	14
Physical sciences	56
Physics	15
Piezoelectric crystals	20
Pipelines	1
Planning	3
Plastics	2
Plumbing	3
Pneumatics	2
Police	25
Politics	1712
Polygraphy	3
Power electronics	7
Power lines	7
Power system protection	25
Private international law	14
Procedural law	113
Procurement	15
Project management	3
Proverb	1
Psychology	57
Public relations	2
Pulp and paper industry	7
Radio	54
Radiolocation	5
Radiology	4
Rail transport	14
Real estate	60
Reliability	20
Religion	35
Remote sensing	59
Research and development	76
Resins	1
Risk Management	4
Satellite communications	2
School	1
Scientific	56
Scuba diving	103
Security systems	18
Semiconductors	2
Social science	1060
Socialism	8
Sociology	57
Soil science	33
Sound recording	14
Spanish	16
Spices	2
Sports	1
Statistics	902
Sugar production	10
Superconductivity	12
Taxes	284
Technology	2852
Telecommunications	33
Telegraphy	16
Telephony	18
Television	6
Textile industry	449
Thermal Energy	13
Thermal engineering	1
Tobacco industry	1
Topography	2
Trade unions	56
Transformers	1
Transport	3178
Ultrasound	15
United Nations	2904
United States	2
Vacuum tubes	2
Veterinary medicine	128
Video recording	7
Virology	4
Waste management	2
Water resources	155
Water supply	2
Weapons and gunsmithing	39
Welding	1
Welfare & Social Security	6
Wind Energy	3
Wood processing	49
Work flow	139