Classification
330 - Economics
320 - Political science
62
610 - Medicine & health
25
630 - Agriculture & related technologies
18
000 - Computer science, information & general works
17
333 - Economics of land & energy
17
363 - Other social problems & services
14
340 - Law
13
580 - Plants (Botany)
13
700 - The arts; fine & decorative arts
13
600 - Technology
12
361 - Social problems & social welfare in general
10
620 - Engineering & allied operations
8
900 - History & geography
8
300 - Social sciences
7
140 - Specific philosophical schools
5
370 - Education
5
380 - Commerce, communications & transportation
5
581 - Specific topics in natural history
5
551 - Geology, hydrology & meteorology
4
658 - General management
4
100 - Philosophy & psychology
3
590 - Animals (Zoology)
3
006 - Special computer methods
2
200 - Religion
2
302 - Social interaction
2
331 - Labor economics
2
381 - Commerce
2
500 - Natural sciences & mathematics
2
170 - Ethics
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
338 - Production
1
400 - Language
1
612 - Human physiology
1
670 - Manufacturing
1
745 - Decorative arts
1
791 - Public performances
1
794 - Indoor games of skill
1
800 - Literature & rhetoric
1