Classification
600 - Technology
610 - Medicine & health
620 - Engineering & allied operations
900 - History & geography
700 - The arts; fine & decorative arts
117
333 - Economics of land & energy
85
363 - Other social problems & services
52
000 - Computer science, information & general works
33
330 - Economics
32
580 - Plants (Botany)
30
380 - Commerce, communications & transportation
29
140 - Specific philosophical schools
27
720 - Architecture
17
370 - Education
14
576 - Genetics & evolution
14
500 - Natural sciences & mathematics
11
630 - Agriculture & related technologies
11
320 - Political science
9
100 - Philosophy & psychology
8
400 - Language
8
414 - Phonology & phonetics
8
540 - Chemistry & allied sciences
8
300 - Social sciences
7
551 - Geology, hydrology & meteorology
7
800 - Literature & rhetoric
6
170 - Ethics
5
340 - Law
5
410 - Linguistics
5
530 - Physics
4
658 - General management
4
304 - Factors affecting social behavior
3
612 - Human physiology
3
780 - Music
3
581 - Specific topics in natural history
2
615 - Pharmacology & therapeutics
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
360 - Social problems & services; associations
1
550 - Earth sciences
1
657 - Accounting
1