Classification
380 - Commerce, communications & transportation
600 - Technology
610 - Medicine & health
700 - The arts; fine & decorative arts
58
333 - Economics of land & energy
41
620 - Engineering & allied operations
38
000 - Computer science, information & general works
34
900 - History & geography
31
330 - Economics
30
363 - Other social problems & services
30
140 - Specific philosophical schools
28
370 - Education
19
580 - Plants (Botany)
15
320 - Political science
13
576 - Genetics & evolution
13
658 - General management
12
720 - Architecture
12
400 - Language
11
500 - Natural sciences & mathematics
10
304 - Factors affecting social behavior
9
551 - Geology, hydrology & meteorology
9
630 - Agriculture & related technologies
7
800 - Literature & rhetoric
7
170 - Ethics
6
340 - Law
6
300 - Social sciences
4
612 - Human physiology
4
540 - Chemistry & allied sciences
3
100 - Philosophy & psychology
2
410 - Linguistics
2
615 - Pharmacology & therapeutics
2
200 - Religion
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
414 - Phonology & phonetics
1
530 - Physics
1
581 - Specific topics in natural history
1
780 - Music
1