Classification
330 - Economics
96
000 - Computer science, information & general works
70
320 - Political science
54
610 - Medicine & health
53
580 - Plants (Botany)
33
600 - Technology
31
700 - The arts; fine & decorative arts
29
333 - Economics of land & energy
23
630 - Agriculture & related technologies
23
340 - Law
22
363 - Other social problems & services
22
664 - Food technology
20
620 - Engineering & allied operations
19
361 - Social problems & social welfare in general
16
540 - Chemistry & allied sciences
14
140 - Specific philosophical schools
12
380 - Commerce, communications & transportation
10
300 - Social sciences
9
551 - Geology, hydrology & meteorology
7
576 - Genetics & evolution
7
900 - History & geography
7
370 - Education
6
612 - Human physiology
6
658 - General management
6
581 - Specific topics in natural history
5
414 - Phonology & phonetics
4
640 - Home & family management
4
304 - Factors affecting social behavior
3
520 - Astronomy & allied sciences
3
590 - Animals (Zoology)
3
800 - Literature & rhetoric
3
170 - Ethics
2
200 - Religion
2
615 - Pharmacology & therapeutics
2
660 - Chemical engineering
2
820 - English & Old English literatures
2
100 - Philosophy & psychology
1
336 - Public finance
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
547 - Organic chemistry
1
572 - Biochemistry
1
613 - Personal health & safety
1
616 - Diseases
1
628 - Sanitary & municipal engineering
1
661 - Industrial chemicals
1