Classification
330 - Economics
363 - Other social problems & services
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
900 - History & geography
600 - Technology
42
333 - Economics of land & energy
28
380 - Commerce, communications & transportation
17
000 - Computer science, information & general works
13
140 - Specific philosophical schools
9
370 - Education
9
320 - Political science
8
720 - Architecture
8
580 - Plants (Botany)
7
610 - Medicine & health
6
800 - Literature & rhetoric
6
551 - Geology, hydrology & meteorology
5
658 - General management
4
400 - Language
3
576 - Genetics & evolution
3
200 - Religion
2
297 - Islam, Babism & Bahai Faith
2
340 - Law
2
581 - Specific topics in natural history
2
300 - Social sciences
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
360 - Social problems & services; associations
1
414 - Phonology & phonetics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
615 - Pharmacology & therapeutics
1
630 - Agriculture & related technologies
1