Classification
551 - Geology, hydrology & meteorology
333 - Economics of land & energy
13
330 - Economics
12
363 - Other social problems & services
11
581 - Specific topics in natural history
11
700 - The arts; fine & decorative arts
11
600 - Technology
10
000 - Computer science, information & general works
9
580 - Plants (Botany)
8
320 - Political science
6
610 - Medicine & health
6
620 - Engineering & allied operations
6
630 - Agriculture & related technologies
6
380 - Commerce, communications & transportation
4
900 - History & geography
4
304 - Factors affecting social behavior
3
140 - Specific philosophical schools
2
200 - Religion
2
297 - Islam, Babism & Bahai Faith
2
340 - Law
1
410 - Linguistics
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
612 - Human physiology
1
800 - Literature & rhetoric
1