Classification
140 - Specific philosophical schools
610 - Medicine & health
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
31
900 - History & geography
22
000 - Computer science, information & general works
21
333 - Economics of land & energy
19
363 - Other social problems & services
16
380 - Commerce, communications & transportation
13
580 - Plants (Botany)
13
576 - Genetics & evolution
9
330 - Economics
8
540 - Chemistry & allied sciences
7
300 - Social sciences
6
340 - Law
5
720 - Architecture
5
370 - Education
4
400 - Language
4
414 - Phonology & phonetics
4
500 - Natural sciences & mathematics
4
551 - Geology, hydrology & meteorology
4
612 - Human physiology
4
630 - Agriculture & related technologies
4
581 - Specific topics in natural history
3
800 - Literature & rhetoric
3
170 - Ethics
2
658 - General management
2
100 - Philosophy & psychology
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
320 - Political science
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
530 - Physics
1
615 - Pharmacology & therapeutics
1