| Subject |
Number of entries |
| Abbreviation |
1 |
| Accounting |
1.916 |
| Accumulators |
173 |
| Acoustics |
116 |
| Acridology |
2 |
| Agriculture |
57.206 |
| Alternative dispute resolution |
1 |
| Anatomy |
6 |
| Animal husbandry |
703 |
| Antennas and waveguides |
2.340 |
| Art |
401 |
| Astronautics |
497 |
| Astronomy |
8.345 |
| Automated equipment |
3.512 |
| Automatic control |
491 |
| Automobiles |
1 |
| Aviation |
277 |
| Bacteriology |
32 |
| Banking |
2.427 |
| Beekeeping |
2 |
| Beverages |
4 |
| Biochemistry |
40 |
| Bioenergy |
183 |
| Biology |
54 |
| Biotechnology |
293 |
| Book binding |
474 |
| Botany |
121 |
| Business style |
1 |
| Business |
346 |
| Cables and cable production |
248 |
| Cartography |
1 |
| Chemistry |
34.656 |
| Christianity |
2 |
| Climatology |
145 |
| Coal |
2.572 |
| Coffee |
1 |
| Commerce |
2.372 |
| Communications |
31.104 |
| Computer numerical control |
1.046 |
| Computers |
129 |
| Construction |
10.110 |
| Corporate governance |
650 |
| Criminal law |
926 |
| Cultural studies |
2.688 |
| Customs |
357 |
| Data processing |
223 |
| Demography |
958 |
| Dermatology |
3 |
| Dyalysis |
707 |
| Earth sciences |
20.176 |
| Ecology |
205 |
| Economics |
21.500 |
| Education |
4.264 |
| Electric machinery |
296 |
| Electric motors |
315 |
| Electric traction |
770 |
| Electrical engineering |
279 |
| Electricity generation |
379 |
| Electrochemistry |
101 |
| Electronics |
33.620 |
| Embryology |
22 |
| Employment |
242 |
| Energy industry |
3.159 |
| English |
213 |
| Entomology |
27 |
| Environment |
23.716 |
| European Union |
160 |
| Finances |
34.145 |
| Fish farming pisciculture |
5.667 |
| Fishery fishing industry |
276 |
| Food industry |
3.844 |
| Food service and catering |
553 |
| Footwear |
595 |
| Forestry |
1.504 |
| Gardening |
9 |
| General |
61.398 |
| Genetics |
372 |
| Geography |
850 |
| Geology |
5 |
| Geophysics |
37 |
| Government, administration and public services |
747 |
| Ground forces Army |
6 |
| Health care |
19.910 |
| Hobbies and pastimes |
2.641 |
| Horticulture |
58 |
| Human rights activism |
1.208 |
| Hydraulics |
2 |
| Hydrology |
57 |
| Hygiene |
12 |
| Ichthyology |
836 |
| Immigration and citizenship |
2.138 |
| Industry |
27.264 |
| Informal |
2 |
| Information technology |
31.582 |
| Insurance |
3.205 |
| International law |
161 |
| International trade |
989 |
| Investment |
91 |
| Isolation |
133 |
| Knitted goods |
1 |
| Labor law |
4.669 |
| Labor organization |
91 |
| Laboratory equipment |
28 |
| Latin American |
15 |
| Law |
26.834 |
| Leather |
134 |
| Librarianship |
819 |
| Life sciences |
15.586 |
| Lighting other than cinema |
566 |
| Loading equipment |
570 |
| Magnetics |
491 |
| Mammals |
61 |
| Marketing |
5.323 |
| Materials science |
6.430 |
| Mathematics |
5.465 |
| Measuring instruments |
4.620 |
| Mechanic engineering |
23.126 |
| Mechanics |
81 |
| Medical appliances |
28 |
| Medical |
171.931 |
| Metallurgy |
39.998 |
| Meteorology |
25 |
| Metrology |
98 |
| Microbiology |
12 |
| Microsoft |
18.542 |
| Military |
2 |
| Milk production |
23 |
| Mineral products |
386 |
| Mining |
54 |
| Municipal planning |
2.369 |
| Name of organization |
2.230 |
| Natural resourses and wildlife conservation |
7.501 |
| Natural sciences |
18.870 |
| Nautical |
17 |
| Navigation |
9 |
| Nuclear and fusion power |
419 |
| Nuclear physics |
1.366 |
| Obsolete / dated |
749 |
| Obstetrics |
9 |
| Oceanography & oceanology |
8 |
| Oil / petroleum |
313 |
| Ophthalmology |
8 |
| Optics branch of physics |
13 |
| Ornithology |
60 |
| Packaging |
6.268 |
| Patents |
6.274 |
| Pathology |
3 |
| Pest control |
109 |
| Pets |
4 |
| Pharmacology |
4 |
| Pharmacy and pharmacology |
3.426 |
| Philately / stamp collecting |
8 |
| Photography |
1 |
| Physical sciences |
1.895 |
| Physics |
377 |
| Physiology |
1 |
| Piezoelectric crystals |
312 |
| Planning |
1 |
| Plastics |
1 |
| Politics |
4.135 |
| Polygraphy |
205 |
| Polymers |
116 |
| Power electronics |
209 |
| Power lines |
653 |
| Power system protection |
384 |
| Printed circuit boards |
31 |
| Private international law |
55 |
| Procedural law |
896 |
| Psychiatry |
29 |
| Psychology |
9 |
| Public relations |
12 |
| Radio |
1.521 |
| Radiobiology |
262 |
| Radiology |
181 |
| Rail transport |
441 |
| Reliability |
72 |
| Religion |
398 |
| Remote sensing |
4 |
| Research and development |
460 |
| Satellite communications |
106 |
| School |
27 |
| Scientific |
1.065 |
| Security systems |
196 |
| Semiconductors |
224 |
| Shipbuilding |
1 |
| Social science |
5.951 |
| Socialism |
9 |
| Sociology |
193 |
| Soil science |
45 |
| Sound recording |
309 |
| Statistics |
10.514 |
| Stock Exchange |
5 |
| Sugar production |
54 |
| Surgery |
3 |
| Surveying |
13 |
| Taxes |
1.977 |
| Technology |
8.084 |
| Telecommunications |
619 |
| Telegraphy |
627 |
| Telephony |
277 |
| Textile industry |
9.259 |
| Thermal Energy |
539 |
| Toxicology |
13 |
| Trade unions |
385 |
| Transformers |
188 |
| Transport |
50.800 |
| United Nations |
892 |
| United States |
7 |
| Vacuum tubes |
64 |
| Veterinary medicine |
164 |
| Video recording |
130 |
| Virology |
17 |
| Waste management |
113 |
| Water resources |
543 |
| Welding |
127 |
| Welfare & Social Security |
12 |
| Wind Energy |
77 |
| Wood processing |
744 |
| Work flow |
2.228 |
| Zoology |
31 |
| Total: |
963.943 |
