Classification
610 - Medicine & health
32
000 - Computer science, information & general works
24
700 - The arts; fine & decorative arts
24
580 - Plants (Botany)
17
363 - Other social problems & services
15
600 - Technology
14
333 - Economics of land & energy
12
140 - Specific philosophical schools
10
540 - Chemistry & allied sciences
9
581 - Specific topics in natural history
9
630 - Agriculture & related technologies
9
620 - Engineering & allied operations
7
304 - Factors affecting social behavior
6
551 - Geology, hydrology & meteorology
6
900 - History & geography
4
330 - Economics
3
380 - Commerce, communications & transportation
3
576 - Genetics & evolution
3
615 - Pharmacology & therapeutics
3
800 - Literature & rhetoric
3
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
170 - Ethics
1
320 - Political science
1
370 - Education
1
410 - Linguistics
1
530 - Physics
1
590 - Animals (Zoology)
1
770 - Photography, photographs & computer art
1