Classification
333 - Economics of land & energy
330 - Economics
70
320 - Political science
64
600 - Technology
50
700 - The arts; fine & decorative arts
47
363 - Other social problems & services
46
300 - Social sciences
42
900 - History & geography
35
620 - Engineering & allied operations
34
100 - Philosophy & psychology
31
140 - Specific philosophical schools
30
610 - Medicine & health
27
370 - Education
26
000 - Computer science, information & general works
18
380 - Commerce, communications & transportation
15
530 - Physics
14
551 - Geology, hydrology & meteorology
14
581 - Specific topics in natural history
13
301 - Sociology & anthropology
12
340 - Law
12
630 - Agriculture & related technologies
12
200 - Religion
10
400 - Language
10
720 - Architecture
10
170 - Ethics
9
540 - Chemistry & allied sciences
8
800 - Literature & rhetoric
8
500 - Natural sciences & mathematics
7
658 - General management
7
304 - Factors affecting social behavior
6
580 - Plants (Botany)
6
361 - Social problems & social welfare in general
5
410 - Linguistics
5
576 - Genetics & evolution
4
780 - Music
4
360 - Social problems & services; associations
3
364 - Criminology
3
120 - Epistemology, causation & humankind
2
160 - Logic
1
296 - Judaism
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
350 - Public administration & military science
1
520 - Astronomy & allied sciences
1
791 - Public performances
1