Classification
000 - Computer science, information & general works
37
610 - Medicine & health
29
363 - Other social problems & services
28
700 - The arts; fine & decorative arts
25
333 - Economics of land & energy
20
580 - Plants (Botany)
20
581 - Specific topics in natural history
15
330 - Economics
14
576 - Genetics & evolution
13
551 - Geology, hydrology & meteorology
12
320 - Political science
10
140 - Specific philosophical schools
9
304 - Factors affecting social behavior
9
900 - History & geography
9
600 - Technology
8
380 - Commerce, communications & transportation
7
620 - Engineering & allied operations
6
800 - Literature & rhetoric
6
414 - Phonology & phonetics
5
570 - Life sciences; biology
5
630 - Agriculture & related technologies
5
720 - Architecture
5
500 - Natural sciences & mathematics
3
540 - Chemistry & allied sciences
3
300 - Social sciences
2
370 - Education
2
400 - Language
2
410 - Linguistics
2
657 - Accounting
2
658 - General management
2
100 - Philosophy & psychology
1
200 - Religion
1
301 - Sociology & anthropology
1
340 - Law
1
360 - Social problems & services; associations
1
364 - Criminology
1
550 - Earth sciences
1
590 - Animals (Zoology)
1
791 - Public performances
1