Classification
581 - Specific topics in natural history
363 - Other social problems & services
55
333 - Economics of land & energy
32
330 - Economics
31
320 - Political science
26
600 - Technology
21
700 - The arts; fine & decorative arts
20
630 - Agriculture & related technologies
18
620 - Engineering & allied operations
16
140 - Specific philosophical schools
15
580 - Plants (Botany)
15
551 - Geology, hydrology & meteorology
14
340 - Law
12
900 - History & geography
12
000 - Computer science, information & general works
10
610 - Medicine & health
9
100 - Philosophy & psychology
6
200 - Religion
6
300 - Social sciences
6
304 - Factors affecting social behavior
5
170 - Ethics
4
301 - Sociology & anthropology
3
370 - Education
3
380 - Commerce, communications & transportation
3
414 - Phonology & phonetics
3
540 - Chemistry & allied sciences
3
590 - Animals (Zoology)
3
576 - Genetics & evolution
2
658 - General management
2
720 - Architecture
2
800 - Literature & rhetoric
2
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
780 - Music
1