Classification
000 - Computer science, information & general works
320 - Political science
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
47
333 - Economics of land & energy
42
330 - Economics
38
600 - Technology
30
363 - Other social problems & services
27
551 - Geology, hydrology & meteorology
22
140 - Specific philosophical schools
16
370 - Education
15
900 - History & geography
15
610 - Medicine & health
12
340 - Law
9
620 - Engineering & allied operations
9
576 - Genetics & evolution
8
581 - Specific topics in natural history
7
720 - Architecture
6
300 - Social sciences
5
400 - Language
5
630 - Agriculture & related technologies
5
800 - Literature & rhetoric
5
100 - Philosophy & psychology
4
304 - Factors affecting social behavior
4
414 - Phonology & phonetics
4
530 - Physics
4
580 - Plants (Botany)
4
170 - Ethics
3
200 - Religion
3
361 - Social problems & social welfare in general
3
540 - Chemistry & allied sciences
3
657 - Accounting
3
658 - General management
3
297 - Islam, Babism & Bahai Faith
2
301 - Sociology & anthropology
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
520 - Astronomy & allied sciences
2
791 - Public performances
2
350 - Public administration & military science
1
360 - Social problems & services; associations
1
550 - Earth sciences
1