| Subject |
Number of entries |
| Accounting |
1.469 |
| Agriculture |
35.315 |
| Animal husbandry |
565 |
| Art |
240 |
| Astronautics |
135 |
| Aviation |
9 |
| Banking |
187 |
| Book binding |
68 |
| Business |
518 |
| Chemistry |
20.969 |
| Coal |
2.308 |
| Commerce |
1.789 |
| Communications |
28.083 |
| Computers |
55 |
| Construction |
8.620 |
| Corporate governance |
42 |
| Criminal law |
804 |
| Cultural studies |
1.749 |
| Customs |
295 |
| Data processing |
148 |
| Demography |
622 |
| Earth sciences |
18.026 |
| Ecology |
183 |
| Economics |
17.803 |
| Education |
3.729 |
| Electronics |
28.891 |
| Employment |
154 |
| Energy industry |
2.986 |
| Environment |
18.214 |
| European Union |
74 |
| Finances |
24.391 |
| Fish farming pisciculture |
5.262 |
| Food industry |
3.397 |
| Forestry |
774 |
| General |
43.601 |
| Geography |
957 |
| Geophysics |
17 |
| Government, administration and public services |
954 |
| Ground forces Army |
3 |
| Health care |
13.443 |
| Hobbies and pastimes |
1.961 |
| Human rights activism |
923 |
| Ichthyology |
70 |
| Immigration and citizenship |
1.599 |
| Industry |
23.536 |
| Information technology |
27.204 |
| Insurance |
3.065 |
| International law |
140 |
| International trade |
613 |
| Investment |
64 |
| Labor law |
3.761 |
| Labor organization |
83 |
| Latin American |
11 |
| Law |
22.521 |
| Leather |
126 |
| Life sciences |
12.686 |
| Mammals |
58 |
| Marketing |
3.634 |
| Materials science |
4.924 |
| Mathematics |
3.316 |
| Mechanic engineering |
18.794 |
| Medical |
89.238 |
| Metallurgy |
12.686 |
| Microsoft |
11.969 |
| Mineral products |
285 |
| Mining |
70 |
| Municipal planning |
2.102 |
| Natural resourses and wildlife conservation |
4.048 |
| Natural sciences |
13.382 |
| Nautical |
5 |
| Nuclear and fusion power |
285 |
| Nuclear physics |
761 |
| Obsolete / dated |
898 |
| Oil / petroleum |
171 |
| Ornithology |
54 |
| Patents |
6.430 |
| Pharmacy and pharmacology |
2.252 |
| Physical sciences |
1.548 |
| Politics |
3.516 |
| Polygraphy |
188 |
| Private international law |
37 |
| Procedural law |
1.058 |
| Psychology |
5 |
| Public relations |
25 |
| Religion |
328 |
| Research and development |
451 |
| School |
21 |
| Scientific |
839 |
| Security systems |
182 |
| Social science |
4.801 |
| Sociology |
119 |
| Statistics |
8.606 |
| Sugar production |
65 |
| Taxes |
1.270 |
| Technology |
8.671 |
| Textile industry |
780 |
| Trade unions |
317 |
| Transport |
38.157 |
| United Nations |
636 |
| Waste management |
65 |
| Wood processing |
89 |
| Work flow |
2.036 |
| Total: |
634.384 |
