Accounting	219
Accumulators	14
Acoustics	7
Acridology	4
Agriculture	3603
Alcohol distilling	1
Animal husbandry	260
Antennas and waveguides	396
Art	47
Astronautics	45
Astronomy	3
Automated equipment	350
Automatic control	48
Aviation	42
Banking	19
Beverages	2
Biochemistry	6
Bioenergy	2
Biology	15
Biotechnology	41
Book binding	12
Botany	342
Brewery	1
Business	81
Cables and cable production	29
Canada	46
Cartography	5
Ceramics	2
Chemical fibers	23
Chemistry	2710
Cinematography	24
Climatology	8
Coal	195
Commerce	267
Communications	4540
Computer networks	10
Computer numerical control	90
Computers	10
Construction	715
Corporate governance	246
Criminal law	120
Cultural studies	137
Customs	28
Data processing	72
Demography	58
Dyalysis	46
Dyes	7
Earth sciences	1655
Ecology	21
Economics	2246
Education	489
Electric machinery	23
Electric motors	54
Electric traction	56
Electricity generation	72
Electrochemistry	21
Electronics	4143
Employment	9
Energy industry	392
English	20
Entomology	49
Environment	2021
European Union	13
Explosives and Explosive Ordnance Disposal	6
Finances	3571
Fish farming pisciculture	251
Fishery fishing industry	92
Food industry	446
Food service and catering	115
Forestry	406
Gardening	10
General	5440
Genetics	80
Geography	97
Geology	10
Glass production	1
Government, administration and public services	77
Health care	1190
Hobbies and pastimes	182
Horticulture	59
Human rights activism	161
Hydrology	73
Hygiene	9
Ichthyology	44
Immigration and citizenship	244
Industry	1624
Information technology	3493
Insurance	492
International law	25
International Monetary Fund	1692
International trade	64
Investment	23
Isolation	29
Knitted goods	13
Labor law	348
Labor organization	18
Laboratory equipment	55
Latin American	7
Law	2999
Leather	14
Librarianship	81
Life sciences	1176
Lighting other than cinema	41
Loading equipment	84
Magnetics	52
Mammals	4
Marketing	411
Materials science	584
Mathematics	415
Measuring instruments	412
Mechanic engineering	1931
Mechanics	13
Medical	3517
Metallurgy	994
Meteorology	1
Mexican	30
Microbiology	25
Microscopy	5
Microsoft	1913
Military	1
Milk production	8
Mineral products	31
Mineralogy	7
Mining	6
Municipal planning	144
Name of organization	1635
Natural resourses and wildlife conservation	309
Natural sciences	989
Nautical	20
Nuclear and fusion power	21
Nuclear physics	163
Obsolete / dated	71
Oceanography & oceanology	1
Oil / petroleum	33
Optics branch of physics	2
Packaging	570
Paint, varnish and lacquer	8
Patents	1571
Pest control	61
Pets	2
Pharmacology	12
Pharmacy and pharmacology	174
Photography	8
Physical sciences	103
Physics	33
Piezoelectric crystals	27
Planning	9
Plastics	12
Politics	811
Polygraphy	3
Power electronics	15
Power lines	63
Power system protection	46
Printed circuit boards	1
Private international law	8
Procedural law	64
Public relations	2
Pulp and paper industry	23
Radio	116
Radiology	23
Rail transport	59
Reliability	64
Religion	23
Remote sensing	102
Research and development	53
Resins	2
Risk Management	5
Satellite communications	9
School	3
Scientific	76
Scuba diving	4
Security systems	73
Semiconductors	11
Social science	668
Socialism	6
Sociology	60
Soil science	49
Sound recording	35
Spanish	20
Statistics	1002
Sugar production	9
Superconductivity	25
Surveying	1
Taxes	225
Technology	1293
Telecommunications	90
Telegraphy	63
Telephony	28
Textile industry	577
Thermal Energy	76
Trade unions	22
Transformers	15
Transport	5325
Ultrasound	7
United Nations	1737
Vacuum tubes	1
Veterinary medicine	48
Video recording	15
Waste management	33
Water resources	460
Water supply	17
Welding	16
Welfare & Social Security	5
Wind Energy	5
Wood processing	54
Work flow	324
Zoology	5


exploitation abbr.
agric.	explotación agraria; hacienda
agric. fish.farm.	granja de peces; granja de piscicultura; piscifactoria
fin.	dirección
IT dat.proc.	explotación y gestión
law	explotación
med.	cultivo