Classification
330 - Economics
576 - Genetics & evolution
600 - Technology
700 - The arts; fine & decorative arts
333 - Economics of land & energy
23
000 - Computer science, information & general works
21
620 - Engineering & allied operations
20
900 - History & geography
17
363 - Other social problems & services
9
380 - Commerce, communications & transportation
9
658 - General management
8
720 - Architecture
8
610 - Medicine & health
6
140 - Specific philosophical schools
5
320 - Political science
5
500 - Natural sciences & mathematics
5
580 - Plants (Botany)
5
800 - Literature & rhetoric
5
370 - Education
4
400 - Language
3
630 - Agriculture & related technologies
3
300 - Social sciences
2
340 - Law
2
530 - Physics
2
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
2
100 - Philosophy & psychology
1
160 - Logic
1
200 - Religion
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
410 - Linguistics
1
414 - Phonology & phonetics
1
581 - Specific topics in natural history
1
657 - Accounting
1