Classification
330 - Economics
658 - General management
900 - History & geography
26
600 - Technology
23
620 - Engineering & allied operations
23
700 - The arts; fine & decorative arts
17
333 - Economics of land & energy
11
363 - Other social problems & services
9
000 - Computer science, information & general works
8
580 - Plants (Botany)
7
370 - Education
6
380 - Commerce, communications & transportation
6
320 - Political science
5
140 - Specific philosophical schools
4
500 - Natural sciences & mathematics
4
576 - Genetics & evolution
4
720 - Architecture
4
100 - Philosophy & psychology
3
300 - Social sciences
3
340 - Law
3
400 - Language
3
410 - Linguistics
3
610 - Medicine & health
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
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
770 - Photography, photographs & computer art
1