Classification
581 - Specific topics in natural history
363 - Other social problems & services
22
000 - Computer science, information & general works
20
700 - The arts; fine & decorative arts
18
600 - Technology
17
333 - Economics of land & energy
15
140 - Specific philosophical schools
14
320 - Political science
13
330 - Economics
11
576 - Genetics & evolution
11
100 - Philosophy & psychology
10
300 - Social sciences
10
551 - Geology, hydrology & meteorology
9
900 - History & geography
9
301 - Sociology & anthropology
7
380 - Commerce, communications & transportation
7
200 - Religion
6
580 - Plants (Botany)
5
170 - Ethics
4
304 - Factors affecting social behavior
4
370 - Education
4
791 - Public performances
4
800 - Literature & rhetoric
4
410 - Linguistics
3
500 - Natural sciences & mathematics
3
610 - Medicine & health
3
630 - Agriculture & related technologies
3
361 - Social problems & social welfare in general
2
400 - Language
2
520 - Astronomy & allied sciences
2
540 - Chemistry & allied sciences
2
780 - Music
2
120 - Epistemology, causation & humankind
1
340 - Law
1
414 - Phonology & phonetics
1
590 - Animals (Zoology)
1
620 - Engineering & allied operations
1
657 - Accounting
1
658 - General management
1
720 - Architecture
1