Classification
551 - Geology, hydrology & meteorology
000 - Computer science, information & general works
25
363 - Other social problems & services
22
700 - The arts; fine & decorative arts
19
333 - Economics of land & energy
15
330 - Economics
13
320 - Political science
10
140 - Specific philosophical schools
9
380 - Commerce, communications & transportation
9
580 - Plants (Botany)
9
600 - Technology
9
900 - History & geography
8
620 - Engineering & allied operations
7
581 - Specific topics in natural history
6
576 - Genetics & evolution
5
610 - Medicine & health
5
500 - Natural sciences & mathematics
4
550 - Earth sciences
4
630 - Agriculture & related technologies
4
720 - Architecture
3
304 - Factors affecting social behavior
2
414 - Phonology & phonetics
2
800 - Literature & rhetoric
2
170 - Ethics
1
340 - Law
1
370 - Education
1
530 - Physics
1
658 - General management
1
770 - Photography, photographs & computer art
1