Classification
333 - Economics of land & energy
330 - Economics
112
700 - The arts; fine & decorative arts
93
363 - Other social problems & services
87
600 - Technology
84
320 - Political science
77
000 - Computer science, information & general works
69
900 - History & geography
67
551 - Geology, hydrology & meteorology
51
610 - Medicine & health
51
620 - Engineering & allied operations
49
380 - Commerce, communications & transportation
43
370 - Education
36
140 - Specific philosophical schools
31
300 - Social sciences
28
580 - Plants (Botany)
26
340 - Law
21
576 - Genetics & evolution
21
630 - Agriculture & related technologies
19
581 - Specific topics in natural history
16
500 - Natural sciences & mathematics
15
720 - Architecture
15
304 - Factors affecting social behavior
13
530 - Physics
13
100 - Philosophy & psychology
10
170 - Ethics
8
301 - Sociology & anthropology
8
400 - Language
7
658 - General management
7
200 - Religion
6
540 - Chemistry & allied sciences
6
800 - Literature & rhetoric
6
410 - Linguistics
5
350 - Public administration & military science
4
414 - Phonology & phonetics
4
657 - Accounting
4
297 - Islam, Babism & Bahai Faith
3
336 - Public finance
3
361 - Social problems & social welfare in general
2
520 - Astronomy & allied sciences
2
550 - Earth sciences
2
615 - Pharmacology & therapeutics
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
590 - Animals (Zoology)
1