Classification
610 - Medicine & health
800 - Literature & rhetoric
900 - History & geography
45
700 - The arts; fine & decorative arts
36
000 - Computer science, information & general works
25
140 - Specific philosophical schools
25
363 - Other social problems & services
25
333 - Economics of land & energy
22
600 - Technology
18
580 - Plants (Botany)
17
330 - Economics
15
380 - Commerce, communications & transportation
14
100 - Philosophy & psychology
13
620 - Engineering & allied operations
9
300 - Social sciences
8
370 - Education
8
500 - Natural sciences & mathematics
8
551 - Geology, hydrology & meteorology
8
304 - Factors affecting social behavior
7
320 - Political science
7
340 - Law
7
720 - Architecture
7
297 - Islam, Babism & Bahai Faith
6
576 - Genetics & evolution
6
630 - Agriculture & related technologies
6
581 - Specific topics in natural history
5
200 - Religion
4
520 - Astronomy & allied sciences
4
170 - Ethics
3
301 - Sociology & anthropology
3
400 - Language
3
410 - Linguistics
3
414 - Phonology & phonetics
3
658 - General management
3
780 - Music
3
540 - Chemistry & allied sciences
2
615 - Pharmacology & therapeutics
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
364 - Criminology
1
590 - Animals (Zoology)
1
612 - Human physiology
1
791 - Public performances
1
809 - History, description & criticism
1
830 - Literatures of Germanic languages
1
880 - Hellenic literatures; classical Greek
1
920 - Biography, genealogy & insignia
1