Classification
320 - Political science
600 - Technology
900 - History & geography
620 - Engineering & allied operations
74
700 - The arts; fine & decorative arts
55
330 - Economics
50
333 - Economics of land & energy
43
363 - Other social problems & services
38
380 - Commerce, communications & transportation
34
300 - Social sciences
27
000 - Computer science, information & general works
23
551 - Geology, hydrology & meteorology
21
610 - Medicine & health
19
100 - Philosophy & psychology
17
140 - Specific philosophical schools
17
370 - Education
17
340 - Law
15
720 - Architecture
14
630 - Agriculture & related technologies
12
576 - Genetics & evolution
10
301 - Sociology & anthropology
9
581 - Specific topics in natural history
9
170 - Ethics
8
500 - Natural sciences & mathematics
8
400 - Language
7
780 - Music
7
200 - Religion
6
304 - Factors affecting social behavior
6
580 - Plants (Botany)
6
658 - General management
6
410 - Linguistics
3
530 - Physics
3
800 - Literature & rhetoric
3
120 - Epistemology, causation & humankind
2
350 - Public administration & military science
2
361 - Social problems & social welfare in general
2
414 - Phonology & phonetics
2
550 - Earth sciences
2
770 - Photography, photographs & computer art
2
360 - Social problems & services; associations
1
398 - Folklore
1
540 - Chemistry & allied sciences
1
657 - Accounting
1
791 - Public performances
1