Classification
000 - Computer science, information & general works
363 - Other social problems & services
610 - Medicine & health
700 - The arts; fine & decorative arts
21
333 - Economics of land & energy
14
600 - Technology
14
551 - Geology, hydrology & meteorology
12
330 - Economics
11
580 - Plants (Botany)
11
630 - Agriculture & related technologies
11
320 - Political science
9
140 - Specific philosophical schools
8
620 - Engineering & allied operations
8
380 - Commerce, communications & transportation
7
540 - Chemistry & allied sciences
6
581 - Specific topics in natural history
6
658 - General management
6
900 - History & geography
3
100 - Philosophy & psychology
2
340 - Law
2
414 - Phonology & phonetics
2
612 - Human physiology
2
720 - Architecture
2
800 - Literature & rhetoric
2
200 - Religion
1
300 - Social sciences
1
301 - Sociology & anthropology
1
530 - Physics
1
550 - Earth sciences
1
576 - Genetics & evolution
1
615 - Pharmacology & therapeutics
1