Accounting	61
Accumulators	2
Acridology	3
Aeronautics	4
Agriculture	1002
Animal husbandry	25
Antennas and waveguides	18
Architecture	1
Armored vehicles	3
Art	8
Artillery	9
Astronautics	9
Automated equipment	66
Automatic control	12
Automobiles	63
Aviation	50
Aviation medicine	1
Ballistics	1
Banking	104
Baseball	28
Biology	5
Biotechnology	9
Book binding	4
Botany	7
Brewery	1
Business	27
Cables and cable production	1
Cartography	1
Ceramics	1
Chemical fibers	6
Chemistry	440
Climatology	1
Coal	88
Commerce	128
Communications	980
Computer networks	3
Computer numerical control	13
Computers	25
Construction	134
Corporate governance	54
Criminal law	54
Cultural studies	34
Customs	8
Data processing	19
Demography	26
Drilling	35
Dyalysis	16
Dyes	8
Earth sciences	292
Economics	873
Education	202
Electric machinery	29
Electric motors	11
Electric traction	9
Electrical engineering	4
Electricity	12
Electricity generation	8
Electrochemistry	2
Electronics	849
Employment	7
Energy industry	84
Engines	3
English	6
Environment	374
European Union	5
Explosives and Explosive Ordnance Disposal	1
Finances	1738
Fish farming pisciculture	97
Fishery fishing industry	26
Food industry	111
Food service and catering	17
Footwear	8
Forestry	89
General	2800
Genetics	21
Geography	1
Geology	4
Government, administration and public services	38
Health care	307
Helicopters	2
Hobbies and pastimes	26
Horticulture	8
Human rights activism	112
Hydrology	2
Ichthyology	3
Idiomatic	2
Immigration and citizenship	78
Industry	451
Information technology	731
Insurance	207
International law	10
International Monetary Fund	629
International trade	39
Internet	20
Isolation	22
Knitted goods	5
Labor law	130
Labor organization	5
Laboratory equipment	2
Lasers	9
Law	1199
Leather	2
Librarianship	7
Life sciences	155
Lighting other than cinema	3
Loading equipment	31
Logistics	1
Magnetics	4
Marketing	241
Materials science	196
Mathematics	51
Measuring instruments	71
Mechanic engineering	337
Mechanics	13
Medical	595
Metallurgy	383
Meteorology	212
Mexican	4
Microbiology	1
Microsoft	294
Military	39
Milk production	7
Mineral products	9
Mining	16
Municipal planning	17
Name of organization	239
Natural resourses and wildlife conservation	19
Natural sciences	141
Nautical	22
Navigation	5
Navy	3
Nuclear and fusion power	7
Nuclear physics	20
Obsolete / dated	34
Oil / petroleum	10
Packaging	455
Patents	461
Pest control	18
Pharmacy and pharmacology	49
Photography	4
Physical sciences	6
Physics	8
Piezoelectric crystals	4
Plastics	4
Plumbing	1
Pneumatics	2
Police	11
Politics	344
Polygraphy	4
Power electronics	1
Power lines	20
Power system protection	12
Private international law	2
Procedural law	44
Procurement	7
Production	1
Proverb	1
Psychology	23
Pulp and paper industry	4
Radio	22
Radiology	5
Rail transport	14
Real estate	23
Reliability	13
Religion	8
Remote sensing	6
Research and development	8
Resins	1
Risk Management	1
Satellite communications	2
Scientific	12
Scuba diving	1
Security systems	26
Semiconductors	1
Social science	280
Socialism	9
Sociology	20
Soil science	9
Sound recording	8
Spanish	23
Sports	1
Statistics	190
Sugar production	2
Superconductivity	3
Taxes	122
Technology	954
Telecommunications	15
Telegraphy	14
Textile industry	203
Thermal Energy	2
Tobacco industry	1
Trade unions	13
Transformers	7
Transport	1283
United Nations	472
United States	2
Vacuum tubes	1
Veterinary medicine	5
Video recording	1
Virology	1
Waste management	3
Water resources	42
Weapons and gunsmithing	1
Welding	1
Welfare & Social Security	2
Wind Energy	1
Wood processing	37
Work flow	56


a abbr.
gen.	to; toward; towards
comp.	at
comp., MS	medium


C abbr.
agric. chem.	carbon