Classification
330 - Economics
55
300 - Social sciences
48
301 - Sociology & anthropology
39
576 - Genetics & evolution
36
900 - History & geography
30
658 - General management
28
340 - Law
23
620 - Engineering & allied operations
23
320 - Political science
22
100 - Philosophy & psychology
21
610 - Medicine & health
21
616 - Diseases
21
333 - Economics of land & energy
18
306 - Culture & institutions
17
570 - Life sciences; biology
17
572 - Biochemistry
15
700 - The arts; fine & decorative arts
15
780 - Music
14
571 - Physiology & related subjects
13
200 - Religion
12
612 - Human physiology
12
547 - Organic chemistry
11
600 - Technology
11
140 - Specific philosophical schools
10
500 - Natural sciences & mathematics
10
800 - Literature & rhetoric
10
520 - Astronomy & allied sciences
9
541 - Physical chemistry
9
621 - Applied physics
9
150 - Psychology
8
302 - Social interaction
8
530 - Physics
8
599 - Mammals
8
005 - Computer programming, programs & data
7
006 - Special computer methods
7
142 - Critical philosophy
7
305 - Social groups
7
338 - Production
7
370 - Education
7
650 - Management & auxiliary services
7
000 - Computer science, information & general works
6
004 - Data processing & computer science
6
174 - Occupational ethics
6
304 - Factors affecting social behavior
6
580 - Plants (Botany)
6
590 - Animals (Zoology)
6
930 - History of ancient world to ca. 499
6
001 - Knowledge
5
170 - Ethics
5
332 - Financial economics
5
more ...