Classification
380 - Commerce, communications & transportation
576 - Genetics & evolution
700 - The arts; fine & decorative arts
333 - Economics of land & energy
44
600 - Technology
37
620 - Engineering & allied operations
36
000 - Computer science, information & general works
31
900 - History & geography
27
363 - Other social problems & services
25
610 - Medicine & health
21
140 - Specific philosophical schools
20
330 - Economics
16
500 - Natural sciences & mathematics
14
320 - Political science
10
580 - Plants (Botany)
10
340 - Law
9
551 - Geology, hydrology & meteorology
9
658 - General management
9
720 - Architecture
9
540 - Chemistry & allied sciences
8
800 - Literature & rhetoric
7
581 - Specific topics in natural history
6
300 - Social sciences
5
304 - Factors affecting social behavior
5
414 - Phonology & phonetics
5
530 - Physics
5
630 - Agriculture & related technologies
5
370 - Education
4
410 - Linguistics
3
612 - Human physiology
3
100 - Philosophy & psychology
2
170 - Ethics
2
400 - Language
2
791 - Public performances
2
200 - Religion
1
615 - Pharmacology & therapeutics
1
650 - Management & auxiliary services
1
657 - Accounting
1
770 - Photography, photographs & computer art
1