Classification
000 - Computer science, information & general works
47
700 - The arts; fine & decorative arts
37
610 - Medicine & health
36
600 - Technology
31
580 - Plants (Botany)
29
576 - Genetics & evolution
23
333 - Economics of land & energy
20
540 - Chemistry & allied sciences
19
140 - Specific philosophical schools
16
620 - Engineering & allied operations
14
363 - Other social problems & services
12
380 - Commerce, communications & transportation
12
500 - Natural sciences & mathematics
11
330 - Economics
7
551 - Geology, hydrology & meteorology
7
570 - Life sciences; biology
7
612 - Human physiology
7
414 - Phonology & phonetics
6
630 - Agriculture & related technologies
6
581 - Specific topics in natural history
5
615 - Pharmacology & therapeutics
5
664 - Food technology
4
304 - Factors affecting social behavior
3
530 - Physics
3
660 - Chemical engineering
3
900 - History & geography
2
320 - Political science
1
361 - Social problems & social welfare in general
1
370 - Education
1
572 - Biochemistry
1
590 - Animals (Zoology)
1
641 - Food & drink
1
658 - General management
1
662 - Explosives, fuels & related products
1
663 - Beverage technology
1
720 - Architecture
1
800 - Literature & rhetoric
1