Classification
800 - Literature & rhetoric
330 - Economics
89
320 - Political science
49
158 - Applied psychology
24
338 - Production
24
658 - General management
24
900 - History & geography
22
650 - Management & auxiliary services
21
332 - Financial economics
11
170 - Ethics
9
700 - The arts; fine & decorative arts
8
300 - Social sciences
7
500 - Natural sciences & mathematics
7
610 - Medicine & health
7
001 - Knowledge
5
381 - Commerce
5
796 - Athletic & outdoor sports & games
5
000 - Computer science, information & general works
4
303 - Social processes
4
304 - Factors affecting social behavior
4
384 - Communications; telecommunication
4
620 - Engineering & allied operations
4
791 - Public performances
4
005 - Computer programming, programs & data
3
140 - Specific philosophical schools
3
200 - Religion
3
100 - Philosophy & psychology
2
174 - Occupational ethics
2
302 - Social interaction
2
355 - Military science
2
510 - Mathematics
2
629 - Other branches of engineering
2
670 - Manufacturing
2
813 - American fiction in English
2
973 - United States
2
003 - Systems
1
011 - Bibliographies
1
070 - News media, journalism & publishing
1
153 - Mental processes & intelligence
1
301 - Sociology & anthropology
1
305 - Social groups
1
333 - Economics of land & energy
1
398 - Folklore
1
400 - Language
1
410 - Linguistics
1
509 - Historical, geographic & persons treatment
1
519 - Probabilities & applied mathematics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
more ...