Classification
610 - Medicine & health
338
370 - Education
212
700 - The arts; fine & decorative arts
115
330 - Economics
108
374 - Adult education
96
333 - Economics of land & energy
77
140 - Specific philosophical schools
68
000 - Computer science, information & general works
67
600 - Technology
54
100 - Philosophy & psychology
47
320 - Political science
45
363 - Other social problems & services
44
380 - Commerce, communications & transportation
42
658 - General management
42
300 - Social sciences
38
900 - History & geography
34
580 - Plants (Botany)
30
800 - Literature & rhetoric
26
400 - Language
23
500 - Natural sciences & mathematics
19
371 - Schools & their activities; special education
18
570 - Life sciences; biology
17
304 - Factors affecting social behavior
15
620 - Engineering & allied operations
15
170 - Ethics
13
331 - Labor economics
13
378 - Higher education
12
576 - Genetics & evolution
12
612 - Human physiology
12
301 - Sociology & anthropology
11
361 - Social problems & social welfare in general
11
200 - Religion
10
302 - Social interaction
10
306 - Culture & institutions
10
340 - Law
10
410 - Linguistics
10
581 - Specific topics in natural history
10
540 - Chemistry & allied sciences
9
616 - Diseases
9
670 - Manufacturing
9
158 - Applied psychology
8
155 - Differential & developmental psychology
7
379 - Public policy issues in education
7
414 - Phonology & phonetics
7
615 - Pharmacology & therapeutics
7
780 - Music
7
381 - Commerce
6
305 - Social groups
5
332 - Financial economics
5
338 - Production
5
more ...