Classification
000 - Computer science, information & general works
330 - Economics
610 - Medicine & health
700 - The arts; fine & decorative arts
63
333 - Economics of land & energy
52
363 - Other social problems & services
51
600 - Technology
42
140 - Specific philosophical schools
34
320 - Political science
26
380 - Commerce, communications & transportation
25
580 - Plants (Botany)
24
551 - Geology, hydrology & meteorology
21
620 - Engineering & allied operations
20
630 - Agriculture & related technologies
17
658 - General management
17
900 - History & geography
13
370 - Education
12
540 - Chemistry & allied sciences
11
581 - Specific topics in natural history
9
576 - Genetics & evolution
8
720 - Architecture
8
500 - Natural sciences & mathematics
7
304 - Factors affecting social behavior
6
361 - Social problems & social welfare in general
6
800 - Literature & rhetoric
6
340 - Law
5
100 - Philosophy & psychology
4
170 - Ethics
4
300 - Social sciences
4
530 - Physics
4
200 - Religion
3
400 - Language
3
414 - Phonology & phonetics
3
550 - Earth sciences
3
612 - Human physiology
2
615 - Pharmacology & therapeutics
2
780 - Music
2
410 - Linguistics
1
520 - Astronomy & allied sciences
1
650 - Management & auxiliary services
1
657 - Accounting
1