Classification
380 - Commerce, communications & transportation
600 - Technology
620 - Engineering & allied operations
17
700 - The arts; fine & decorative arts
17
900 - History & geography
17
333 - Economics of land & energy
15
363 - Other social problems & services
13
576 - Genetics & evolution
7
000 - Computer science, information & general works
6
610 - Medicine & health
5
720 - Architecture
5
140 - Specific philosophical schools
4
340 - Law
4
580 - Plants (Botany)
4
320 - Political science
3
330 - Economics
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
170 - Ethics
2
300 - Social sciences
2
500 - Natural sciences & mathematics
2
530 - Physics
2
550 - Earth sciences
2
551 - Geology, hydrology & meteorology
2
364 - Criminology
1
370 - Education
1
400 - Language
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
658 - General management
1