Classification
333 - Economics of land & energy
21
330 - Economics
20
700 - The arts; fine & decorative arts
20
000 - Computer science, information & general works
18
363 - Other social problems & services
15
600 - Technology
13
320 - Political science
12
380 - Commerce, communications & transportation
10
610 - Medicine & health
9
580 - Plants (Botany)
8
900 - History & geography
7
140 - Specific philosophical schools
6
340 - Law
6
551 - Geology, hydrology & meteorology
6
370 - Education
5
540 - Chemistry & allied sciences
4
658 - General management
4
100 - Philosophy & psychology
3
200 - Religion
3
297 - Islam, Babism & Bahai Faith
3
304 - Factors affecting social behavior
3
500 - Natural sciences & mathematics
3
620 - Engineering & allied operations
3
800 - Literature & rhetoric
3
410 - Linguistics
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
120 - Epistemology, causation & humankind
1
300 - Social sciences
1
336 - Public finance
1
400 - Language
1
414 - Phonology & phonetics
1
530 - Physics
1
630 - Agriculture & related technologies
1
657 - Accounting
1