Classification
380 - Commerce, communications & transportation
576 - Genetics & evolution
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
27
333 - Economics of land & energy
24
900 - History & geography
23
000 - Computer science, information & general works
16
363 - Other social problems & services
15
140 - Specific philosophical schools
13
610 - Medicine & health
13
500 - Natural sciences & mathematics
10
720 - Architecture
9
580 - Plants (Botany)
8
551 - Geology, hydrology & meteorology
6
300 - Social sciences
5
340 - Law
5
320 - Political science
4
330 - Economics
4
540 - Chemistry & allied sciences
4
581 - Specific topics in natural history
4
658 - General management
4
800 - Literature & rhetoric
4
414 - Phonology & phonetics
3
612 - Human physiology
3
630 - Agriculture & related technologies
3
100 - Philosophy & psychology
2
170 - Ethics
2
370 - Education
2
304 - Factors affecting social behavior
1
410 - Linguistics
1
657 - Accounting
1
770 - Photography, photographs & computer art
1