| Subject |
Number of entries |
| Accounting |
1.394 |
| Agriculture |
32.697 |
| Animal husbandry |
547 |
| Art |
211 |
| Astronautics |
136 |
| Aviation |
5 |
| Banking |
162 |
| Book binding |
68 |
| Business |
509 |
| Chemistry |
21.569 |
| Coal |
2.001 |
| Commerce |
1.613 |
| Communications |
27.560 |
| Computers |
38 |
| Construction |
7.526 |
| Corporate governance |
33 |
| Criminal law |
774 |
| Cultural studies |
1.750 |
| Customs |
292 |
| Data processing |
170 |
| Demography |
498 |
| Earth sciences |
15.836 |
| Ecology |
127 |
| Economics |
16.355 |
| Education |
3.109 |
| Electronics |
26.796 |
| Employment |
202 |
| Energy industry |
2.317 |
| English |
511 |
| Environment |
19.359 |
| European Union |
54 |
| Finances |
23.148 |
| Fish farming pisciculture |
3.903 |
| Food industry |
3.416 |
| Forestry |
613 |
| General |
40.005 |
| Geography |
932 |
| Geophysics |
19 |
| Government, administration and public services |
853 |
| Health care |
11.937 |
| Hobbies and pastimes |
1.829 |
| Human rights activism |
834 |
| Ichthyology |
81 |
| Immigration and citizenship |
1.374 |
| Industry |
18.413 |
| Information technology |
24.581 |
| Insurance |
3.182 |
| International law |
145 |
| International trade |
843 |
| Investment |
77 |
| Labor law |
3.922 |
| Labor organization |
69 |
| Latin American |
6 |
| Law |
16.346 |
| Leather |
125 |
| Life sciences |
11.807 |
| Mammals |
57 |
| Marketing |
3.689 |
| Materials science |
4.517 |
| Mathematics |
2.757 |
| Mechanic engineering |
14.771 |
| Medical |
69.529 |
| Metallurgy |
11.495 |
| Microsoft |
10.825 |
| Mineral products |
171 |
| Mining |
50 |
| Municipal planning |
1.934 |
| Natural resourses and wildlife conservation |
3.941 |
| Natural sciences |
11.939 |
| Nautical |
4 |
| Nuclear and fusion power |
255 |
| Nuclear physics |
677 |
| Obsolete / dated |
688 |
| Oil / petroleum |
143 |
| Ornithology |
54 |
| Patents |
6.821 |
| Pharmacy and pharmacology |
2.189 |
| Physical sciences |
1.399 |
| Politics |
3.435 |
| Polygraphy |
257 |
| Private international law |
30 |
| Procedural law |
934 |
| Psychology |
5 |
| Public relations |
23 |
| Religion |
330 |
| Research and development |
384 |
| School |
19 |
| Scientific |
832 |
| Security systems |
143 |
| Social science |
4.182 |
| Sociology |
120 |
| Statistics |
8.153 |
| Sugar production |
54 |
| Taxes |
1.175 |
| Technology |
5.013 |
| Textile industry |
645 |
| Trade unions |
284 |
| Transport |
34.953 |
| United Nations |
530 |
| Waste management |
54 |
| Wood processing |
98 |
| Work flow |
1.992 |
| Total: |
564.229 |
