Classification
380 - Commerce, communications & transportation
330 - Economics
21
658 - General management
17
384 - Communications; telecommunication
16
333 - Economics of land & energy
11
363 - Other social problems & services
10
320 - Political science
9
302 - Social interaction
7
300 - Social sciences
5
600 - Technology
5
900 - History & geography
4
140 - Specific philosophical schools
3
331 - Labor economics
3
336 - Public finance
3
338 - Production
3
610 - Medicine & health
3
000 - Computer science, information & general works
2
153 - Mental processes & intelligence
2
303 - Social processes
2
304 - Factors affecting social behavior
2
340 - Law
2
500 - Natural sciences & mathematics
2
580 - Plants (Botany)
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
650 - Management & auxiliary services
2
670 - Manufacturing
2
700 - The arts; fine & decorative arts
2
155 - Differential & developmental psychology
1
158 - Applied psychology
1
297 - Islam, Babism & Bahai Faith
1
370 - Education
1
381 - Commerce
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
720 - Architecture
1