Classification
610 - Medicine & health
900 - History & geography
600 - Technology
6
620 - Engineering & allied operations
6
700 - The arts; fine & decorative arts
5
333 - Economics of land & energy
4
363 - Other social problems & services
4
140 - Specific philosophical schools
3
380 - Commerce, communications & transportation
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
170 - Ethics
2
300 - Social sciences
2
340 - Law
2
370 - Education
2
720 - Architecture
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
330 - Economics
1
400 - Language
1
520 - Astronomy & allied sciences
1
530 - Physics
1
581 - Specific topics in natural history
1
658 - General management
1