Classification
330 - Economics
104
658 - General management
102
338 - Production
69
600 - Technology
39
900 - History & geography
36
320 - Political science
35
700 - The arts; fine & decorative arts
35
333 - Economics of land & energy
31
620 - Engineering & allied operations
31
000 - Computer science, information & general works
25
300 - Social sciences
23
363 - Other social problems & services
21
302 - Social interaction
17
332 - Financial economics
17
500 - Natural sciences & mathematics
16
670 - Manufacturing
14
340 - Law
13
380 - Commerce, communications & transportation
12
576 - Genetics & evolution
10
610 - Medicine & health
9
551 - Geology, hydrology & meteorology
8
346 - Private law
7
580 - Plants (Botany)
7
630 - Agriculture & related technologies
7
657 - Accounting
7
140 - Specific philosophical schools
6
370 - Education
6
304 - Factors affecting social behavior
5
540 - Chemistry & allied sciences
4
720 - Architecture
4
170 - Ethics
3
331 - Labor economics
3
414 - Phonology & phonetics
3
158 - Applied psychology
2
381 - Commerce
2
530 - Physics
2
581 - Specific topics in natural history
2
650 - Management & auxiliary services
2
800 - Literature & rhetoric
2
003 - Systems
1
004 - Data processing & computer science
1
100 - Philosophy & psychology
1
150 - Psychology
1
153 - Mental processes & intelligence
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
303 - Social processes
1
327 - International relations
1
343 - Military, tax, trade & industrial law
1
361 - Social problems & social welfare in general
1
more ...