Classification
000 - Computer science, information & general works
333 - Economics of land & energy
380 - Commerce, communications & transportation
610 - Medicine & health
700 - The arts; fine & decorative arts
24
363 - Other social problems & services
20
580 - Plants (Botany)
12
600 - Technology
12
620 - Engineering & allied operations
11
140 - Specific philosophical schools
10
330 - Economics
10
576 - Genetics & evolution
9
551 - Geology, hydrology & meteorology
8
370 - Education
7
900 - History & geography
7
320 - Political science
6
500 - Natural sciences & mathematics
6
540 - Chemistry & allied sciences
6
658 - General management
6
720 - Architecture
6
581 - Specific topics in natural history
5
414 - Phonology & phonetics
4
612 - Human physiology
4
300 - Social sciences
3
630 - Agriculture & related technologies
3
410 - Linguistics
2
100 - Philosophy & psychology
1
200 - Religion
1
304 - Factors affecting social behavior
1
340 - Law
1
364 - Criminology
1
400 - Language
1
530 - Physics
1
800 - Literature & rhetoric
1