Classification
333 - Economics of land & energy
370 - Education
320 - Political science
142
700 - The arts; fine & decorative arts
127
330 - Economics
126
610 - Medicine & health
111
600 - Technology
106
363 - Other social problems & services
100
900 - History & geography
90
000 - Computer science, information & general works
60
140 - Specific philosophical schools
53
380 - Commerce, communications & transportation
53
620 - Engineering & allied operations
52
100 - Philosophy & psychology
51
300 - Social sciences
45
304 - Factors affecting social behavior
36
551 - Geology, hydrology & meteorology
34
500 - Natural sciences & mathematics
29
400 - Language
24
581 - Specific topics in natural history
15
630 - Agriculture & related technologies
15
800 - Literature & rhetoric
14
580 - Plants (Botany)
13
658 - General management
13
720 - Architecture
13
170 - Ethics
12
340 - Law
12
576 - Genetics & evolution
11
780 - Music
10
200 - Religion
8
301 - Sociology & anthropology
8
410 - Linguistics
8
336 - Public finance
7
530 - Physics
7
540 - Chemistry & allied sciences
6
120 - Epistemology, causation & humankind
5
414 - Phonology & phonetics
5
657 - Accounting
5
297 - Islam, Babism & Bahai Faith
3
350 - Public administration & military science
3
361 - Social problems & social welfare in general
3
770 - Photography, photographs & computer art
3
360 - Social problems & services; associations
2
520 - Astronomy & allied sciences
2
398 - Folklore
1
550 - Earth sciences
1
612 - Human physiology
1
791 - Public performances
1