Classification
363 - Other social problems & services
333 - Economics of land & energy
71
700 - The arts; fine & decorative arts
69
330 - Economics
60
320 - Political science
54
600 - Technology
43
620 - Engineering & allied operations
35
300 - Social sciences
32
140 - Specific philosophical schools
30
551 - Geology, hydrology & meteorology
29
900 - History & geography
27
610 - Medicine & health
26
630 - Agriculture & related technologies
23
581 - Specific topics in natural history
21
301 - Sociology & anthropology
20
340 - Law
19
720 - Architecture
17
000 - Computer science, information & general works
16
100 - Philosophy & psychology
15
380 - Commerce, communications & transportation
15
200 - Religion
13
370 - Education
12
304 - Factors affecting social behavior
10
500 - Natural sciences & mathematics
9
170 - Ethics
8
800 - Literature & rhetoric
8
540 - Chemistry & allied sciences
7
580 - Plants (Botany)
7
530 - Physics
6
628 - Sanitary & municipal engineering
6
400 - Language
5
336 - Public finance
4
602 - Miscellany
4
576 - Genetics & evolution
3
696 - Utilities
3
780 - Music
3
120 - Epistemology, causation & humankind
2
410 - Linguistics
2
414 - Phonology & phonetics
2
550 - Earth sciences
2
658 - General management
2
791 - Public performances
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
327 - International relations
1
361 - Social problems & social welfare in general
1
590 - Animals (Zoology)
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
770 - Photography, photographs & computer art
1