Classification
363 - Other social problems & services
610 - Medicine & health
700 - The arts; fine & decorative arts
20
333 - Economics of land & energy
14
000 - Computer science, information & general works
12
600 - Technology
12
140 - Specific philosophical schools
11
330 - Economics
9
500 - Natural sciences & mathematics
9
370 - Education
7
380 - Commerce, communications & transportation
7
320 - Political science
6
340 - Law
6
100 - Philosophy & psychology
5
551 - Geology, hydrology & meteorology
5
580 - Plants (Botany)
5
576 - Genetics & evolution
4
581 - Specific topics in natural history
4
620 - Engineering & allied operations
4
658 - General management
4
630 - Agriculture & related technologies
3
900 - History & geography
3
170 - Ethics
2
200 - Religion
2
612 - Human physiology
2
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
410 - Linguistics
1
414 - Phonology & phonetics
1
615 - Pharmacology & therapeutics
1
800 - Literature & rhetoric
1