Classification
330 - Economics
33
333 - Economics of land & energy
15
000 - Computer science, information & general works
9
600 - Technology
9
320 - Political science
8
363 - Other social problems & services
7
700 - The arts; fine & decorative arts
7
380 - Commerce, communications & transportation
5
140 - Specific philosophical schools
4
340 - Law
4
620 - Engineering & allied operations
4
900 - History & geography
4
370 - Education
3
658 - General management
3
297 - Islam, Babism & Bahai Faith
2
400 - Language
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
610 - Medicine & health
2
800 - Literature & rhetoric
2
336 - Public finance
1
361 - Social problems & social welfare in general
1
500 - Natural sciences & mathematics
1
520 - Astronomy & allied sciences
1
630 - Agriculture & related technologies
1
657 - Accounting
1