Classification
330 - Economics
19
333 - Economics of land & energy
18
700 - The arts; fine & decorative arts
15
363 - Other social problems & services
10
000 - Computer science, information & general works
9
320 - Political science
8
610 - Medicine & health
7
658 - General management
7
600 - Technology
6
551 - Geology, hydrology & meteorology
5
140 - Specific philosophical schools
3
580 - Plants (Botany)
3
720 - Architecture
3
900 - History & geography
3
297 - Islam, Babism & Bahai Faith
2
370 - Education
2
520 - Astronomy & allied sciences
2
630 - Agriculture & related technologies
2
336 - Public finance
1
350 - Public administration & military science
1
380 - Commerce, communications & transportation
1
388 - Transportation; ground transportation
1
500 - Natural sciences & mathematics
1
550 - Earth sciences
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
770 - Photography, photographs & computer art
1
780 - Music
1
800 - Literature & rhetoric
1