Classification
140 - Specific philosophical schools
363 - Other social problems & services
600 - Technology
620 - Engineering & allied operations
67
700 - The arts; fine & decorative arts
59
333 - Economics of land & energy
43
900 - History & geography
43
330 - Economics
40
380 - Commerce, communications & transportation
36
610 - Medicine & health
31
000 - Computer science, information & general works
29
320 - Political science
22
580 - Plants (Botany)
20
551 - Geology, hydrology & meteorology
18
370 - Education
14
576 - Genetics & evolution
13
581 - Specific topics in natural history
13
630 - Agriculture & related technologies
13
720 - Architecture
13
340 - Law
12
400 - Language
9
658 - General management
9
300 - Social sciences
8
500 - Natural sciences & mathematics
8
800 - Literature & rhetoric
7
170 - Ethics
5
200 - Religion
5
304 - Factors affecting social behavior
5
361 - Social problems & social welfare in general
5
100 - Philosophy & psychology
3
612 - Human physiology
3
410 - Linguistics
2
540 - Chemistry & allied sciences
2
615 - Pharmacology & therapeutics
2
657 - Accounting
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
336 - Public finance
1
350 - Public administration & military science
1
414 - Phonology & phonetics
1
530 - Physics
1