Classification
620 - Engineering & allied operations
41
658 - General management
900 - History & geography
600 - Technology
40
330 - Economics
23
700 - The arts; fine & decorative arts
22
000 - Computer science, information & general works
15
380 - Commerce, communications & transportation
15
333 - Economics of land & energy
14
363 - Other social problems & services
12
580 - Plants (Botany)
8
140 - Specific philosophical schools
6
320 - Political science
6
576 - Genetics & evolution
6
720 - Architecture
6
370 - Education
5
500 - Natural sciences & mathematics
4
610 - Medicine & health
4
340 - Law
3
410 - Linguistics
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
100 - Philosophy & psychology
2
300 - Social sciences
2
400 - Language
2
540 - Chemistry & allied sciences
2
780 - Music
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
530 - Physics
1
581 - Specific topics in natural history
1