Classification
363 - Other social problems & services
30
000 - Computer science, information & general works
26
700 - The arts; fine & decorative arts
26
333 - Economics of land & energy
24
330 - Economics
19
320 - Political science
16
380 - Commerce, communications & transportation
13
551 - Geology, hydrology & meteorology
13
580 - Plants (Botany)
12
140 - Specific philosophical schools
11
900 - History & geography
10
581 - Specific topics in natural history
9
600 - Technology
9
610 - Medicine & health
7
340 - Law
6
500 - Natural sciences & mathematics
5
620 - Engineering & allied operations
5
630 - Agriculture & related technologies
5
576 - Genetics & evolution
4
300 - Social sciences
3
301 - Sociology & anthropology
3
370 - Education
3
414 - Phonology & phonetics
3
720 - Architecture
3
800 - Literature & rhetoric
3
304 - Factors affecting social behavior
2
400 - Language
2
305 - Social groups
1
346 - Private law
1
530 - Physics
1
540 - Chemistry & allied sciences
1
577 - Ecology
1
657 - Accounting
1
658 - General management
1
770 - Photography, photographs & computer art
1
791 - Public performances
1