Classification
140 - Specific philosophical schools
580 - Plants (Botany)
900 - History & geography
700 - The arts; fine & decorative arts
19
600 - Technology
18
620 - Engineering & allied operations
18
610 - Medicine & health
12
333 - Economics of land & energy
11
363 - Other social problems & services
10
000 - Computer science, information & general works
7
380 - Commerce, communications & transportation
5
581 - Specific topics in natural history
5
630 - Agriculture & related technologies
4
170 - Ethics
3
300 - Social sciences
3
320 - Political science
3
330 - Economics
3
340 - Law
3
576 - Genetics & evolution
3
658 - General management
3
720 - Architecture
3
800 - Literature & rhetoric
3
100 - Philosophy & psychology
2
297 - Islam, Babism & Bahai Faith
2
410 - Linguistics
2
414 - Phonology & phonetics
2
551 - Geology, hydrology & meteorology
2
120 - Epistemology, causation & humankind
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
398 - Folklore
1
400 - Language
1
530 - Physics
1
540 - Chemistry & allied sciences
1
590 - Animals (Zoology)
1
615 - Pharmacology & therapeutics
1