Classification
330 - Economics
576 - Genetics & evolution
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
20
900 - History & geography
17
000 - Computer science, information & general works
14
333 - Economics of land & energy
13
720 - Architecture
9
363 - Other social problems & services
5
500 - Natural sciences & mathematics
5
380 - Commerce, communications & transportation
4
658 - General management
4
800 - Literature & rhetoric
4
140 - Specific philosophical schools
3
580 - Plants (Botany)
3
610 - Medicine & health
3
370 - Education
2
100 - Philosophy & psychology
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
320 - Political science
1
340 - Law
1
400 - Language
1
414 - Phonology & phonetics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
630 - Agriculture & related technologies
1
657 - Accounting
1