Classification
000 - Computer science, information & general works
333 - Economics of land & energy
700 - The arts; fine & decorative arts
27
600 - Technology
19
620 - Engineering & allied operations
18
380 - Commerce, communications & transportation
16
900 - History & geography
16
330 - Economics
14
576 - Genetics & evolution
11
363 - Other social problems & services
9
500 - Natural sciences & mathematics
9
530 - Physics
7
551 - Geology, hydrology & meteorology
7
580 - Plants (Botany)
7
540 - Chemistry & allied sciences
5
140 - Specific philosophical schools
4
340 - Law
4
414 - Phonology & phonetics
4
581 - Specific topics in natural history
4
610 - Medicine & health
4
612 - Human physiology
4
300 - Social sciences
3
320 - Political science
3
304 - Factors affecting social behavior
2
400 - Language
2
630 - Agriculture & related technologies
2
658 - General management
2
720 - Architecture
2
800 - Literature & rhetoric
2
200 - Religion
1
370 - Education
1
410 - Linguistics
1