Classification
500 - Natural sciences & mathematics
600 - Technology
50
330 - Economics
49
700 - The arts; fine & decorative arts
47
000 - Computer science, information & general works
46
333 - Economics of land & energy
46
620 - Engineering & allied operations
35
363 - Other social problems & services
32
380 - Commerce, communications & transportation
25
610 - Medicine & health
23
900 - History & geography
21
576 - Genetics & evolution
17
140 - Specific philosophical schools
16
580 - Plants (Botany)
16
658 - General management
15
551 - Geology, hydrology & meteorology
13
100 - Philosophy & psychology
12
320 - Political science
12
581 - Specific topics in natural history
10
300 - Social sciences
9
370 - Education
8
340 - Law
6
530 - Physics
6
540 - Chemistry & allied sciences
6
630 - Agriculture & related technologies
6
720 - Architecture
6
800 - Literature & rhetoric
6
400 - Language
5
657 - Accounting
4
120 - Epistemology, causation & humankind
3
170 - Ethics
3
160 - Logic
2
301 - Sociology & anthropology
2
361 - Social problems & social welfare in general
2
410 - Linguistics
2
520 - Astronomy & allied sciences
2
612 - Human physiology
2
304 - Factors affecting social behavior
1
336 - Public finance
1
350 - Public administration & military science
1
615 - Pharmacology & therapeutics
1
780 - Music
1