Classification
610 - Medicine & health
700 - The arts; fine & decorative arts
600 - Technology
61
333 - Economics of land & energy
50
000 - Computer science, information & general works
46
620 - Engineering & allied operations
45
900 - History & geography
39
363 - Other social problems & services
30
140 - Specific philosophical schools
28
380 - Commerce, communications & transportation
25
580 - Plants (Botany)
25
330 - Economics
21
500 - Natural sciences & mathematics
14
630 - Agriculture & related technologies
14
370 - Education
11
551 - Geology, hydrology & meteorology
9
320 - Political science
8
530 - Physics
8
576 - Genetics & evolution
8
720 - Architecture
8
540 - Chemistry & allied sciences
7
800 - Literature & rhetoric
7
400 - Language
6
658 - General management
6
100 - Philosophy & psychology
5
340 - Law
5
414 - Phonology & phonetics
5
615 - Pharmacology & therapeutics
5
170 - Ethics
4
300 - Social sciences
3
304 - Factors affecting social behavior
3
200 - Religion
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
780 - Music
1