| Subject |
Number of entries |
| Accounting |
1.298 |
| Acoustics |
73 |
| Agriculture |
32.863 |
| Animal husbandry |
554 |
| Antennas and waveguides |
2.111 |
| Art |
225 |
| Astronautics |
241 |
| Astronomy |
64 |
| Automated equipment |
3.662 |
| Aviation |
251 |
| Banking |
122 |
| Biology |
12 |
| Book binding |
119 |
| Business |
462 |
| Chemistry |
20.061 |
| Coal |
2.101 |
| Commerce |
1.462 |
| Communications |
28.165 |
| Computer numerical control |
948 |
| Computers |
87 |
| Construction |
6.238 |
| Corporate governance |
54 |
| Criminal law |
727 |
| Cultural studies |
1.622 |
| Customs |
246 |
| Data processing |
143 |
| Demography |
281 |
| Earth sciences |
13.238 |
| Ecology |
100 |
| Economics |
14.859 |
| Education |
1.750 |
| Electronics |
28.198 |
| Employment |
99 |
| Energy industry |
1.889 |
| English |
473 |
| Environment |
16.234 |
| European Union |
54 |
| Finances |
21.911 |
| Fish farming pisciculture |
3.981 |
| Food industry |
3.489 |
| Forestry |
669 |
| General |
39.094 |
| Geography |
551 |
| Geophysics |
11 |
| Government, administration and public services |
520 |
| Ground forces Army |
2 |
| Health care |
11.001 |
| Hobbies and pastimes |
1.751 |
| Human rights activism |
961 |
| Hydraulics |
1 |
| Ichthyology |
76 |
| Immigration and citizenship |
1.131 |
| Industry |
20.243 |
| Information technology |
23.341 |
| Insurance |
2.857 |
| International law |
97 |
| International trade |
414 |
| Investment |
68 |
| Labor law |
2.639 |
| Labor organization |
64 |
| Latin American |
6 |
| Law |
14.737 |
| Leather |
140 |
| Life sciences |
10.758 |
| Mammals |
66 |
| Marketing |
2.731 |
| Materials science |
4.790 |
| Mathematics |
5.209 |
| Measuring instruments |
3.940 |
| Mechanic engineering |
15.657 |
| Mechanics |
71 |
| Medical appliances |
31 |
| Medical |
52.791 |
| Metallurgy |
10.112 |
| Meteorology |
24 |
| Mexican |
199 |
| Microsoft |
12.423 |
| Military |
1 |
| Mineral products |
150 |
| Mining |
42 |
| Municipal planning |
1.328 |
| Natural resourses and wildlife conservation |
3.978 |
| Natural sciences |
13.287 |
| Nautical |
1 |
| Navigation |
8 |
| Nuclear and fusion power |
206 |
| Nuclear physics |
508 |
| Obsolete / dated |
628 |
| Oil / petroleum |
182 |
| Optics branch of physics |
11 |
| Ornithology |
59 |
| Patents |
6.679 |
| Pharmacy and pharmacology |
2.612 |
| Physical sciences |
1.072 |
| Physics |
50 |
| Politics |
3.045 |
| Polygraphy |
246 |
| Private international law |
22 |
| Procedural law |
941 |
| Psychology |
4 |
| Public relations |
17 |
| Religion |
256 |
| Research and development |
231 |
| School |
37 |
| Scientific |
719 |
| Security systems |
150 |
| Social science |
4.125 |
| Sociology |
105 |
| Sound recording |
31 |
| Statistics |
6.715 |
| Sugar production |
45 |
| Surveying |
13 |
| Taxes |
1.415 |
| Technology |
5.653 |
| Telecommunications |
3 |
| Textile industry |
590 |
| Toponym |
1 |
| Trade unions |
270 |
| Transport |
35.454 |
| United Nations |
481 |
| Waste management |
51 |
| Wood processing |
112 |
| Work flow |
2.043 |
| Total: |
543.220 |
