Classification
580 - Plants (Botany)
75
333 - Economics of land & energy
72
620 - Engineering & allied operations
60
621 - Applied physics
54
600 - Technology
49
900 - History & geography
31
700 - The arts; fine & decorative arts
30
000 - Computer science, information & general works
29
330 - Economics
29
363 - Other social problems & services
26
380 - Commerce, communications & transportation
11
576 - Genetics & evolution
8
658 - General management
8
321 - Systems of governments & states
7
500 - Natural sciences & mathematics
6
530 - Physics
6
610 - Medicine & health
6
551 - Geology, hydrology & meteorology
5
340 - Law
4
662 - Explosives, fuels & related products
4
320 - Political science
3
628 - Sanitary & municipal engineering
3
720 - Architecture
3
745 - Decorative arts
3
140 - Specific philosophical schools
2
539 - Modern physics
2
540 - Chemistry & allied sciences
2
542 - Techniques, equipment & materials
2
630 - Agriculture & related technologies
2
660 - Chemical engineering
2
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
302 - Social interaction
1
304 - Factors affecting social behavior
1
410 - Linguistics
1
510 - Mathematics
1
536 - Heat
1
537 - Electricity & electronics
1
546 - Inorganic chemistry
1
547 - Organic chemistry
1
553 - Economic geology
1
581 - Specific topics in natural history
1
627 - Hydraulic engineering
1
629 - Other branches of engineering
1
650 - Management & auxiliary services
1
791 - Public performances
1