Classification
000 - Computer science, information & general works
576 - Genetics & evolution
610 - Medicine & health
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
11
600 - Technology
9
333 - Economics of land & energy
7
363 - Other social problems & services
7
380 - Commerce, communications & transportation
7
140 - Specific philosophical schools
6
500 - Natural sciences & mathematics
6
900 - History & geography
5
540 - Chemistry & allied sciences
4
551 - Geology, hydrology & meteorology
4
580 - Plants (Botany)
4
300 - Social sciences
3
414 - Phonology & phonetics
3
581 - Specific topics in natural history
3
612 - Human physiology
3
330 - Economics
2
370 - Education
2
658 - General management
2
720 - Architecture
2
304 - Factors affecting social behavior
1
410 - Linguistics
1
530 - Physics
1
630 - Agriculture & related technologies
1
800 - Literature & rhetoric
1