Classification
300 - Social sciences
330 - Economics
547
320 - Political science
467
900 - History & geography
121
381 - Commerce
88
658 - General management
81
302 - Social interaction
56
500 - Natural sciences & mathematics
47
670 - Manufacturing
41
338 - Production
27
630 - Agriculture & related technologies
27
331 - Labor economics
18
576 - Genetics & evolution
14
340 - Law
10
380 - Commerce, communications & transportation
10
384 - Communications; telecommunication
10
158 - Applied psychology
8
650 - Management & auxiliary services
8
620 - Engineering & allied operations
5
700 - The arts; fine & decorative arts
5
745 - Decorative arts
5
332 - Financial economics
3
337 - International economics
3
610 - Medicine & health
3
140 - Specific philosophical schools
2
150 - Psychology
2
153 - Mental processes & intelligence
2
170 - Ethics
2
301 - Sociology & anthropology
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
370 - Education
2
600 - Technology
2
800 - Literature & rhetoric
2
000 - Computer science, information & general works
1
001 - Knowledge
1
005 - Computer programming, programs & data
1
006 - Special computer methods
1
100 - Philosophy & psychology
1
174 - Occupational ethics
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
303 - Social processes
1
368 - Insurance
1
382 - International commerce
1
629 - Other branches of engineering
1
647 - Management of public households
1
659 - Advertising & public relations
1
720 - Architecture
1
808 - Rhetoric & collections of literature
1