Classification
100 - Philosophy & psychology
320 - Political science
139
900 - History & geography
131
140 - Specific philosophical schools
73
200 - Religion
70
170 - Ethics
69
370 - Education
65
300 - Social sciences
64
700 - The arts; fine & decorative arts
59
330 - Economics
54
340 - Law
31
800 - Literature & rhetoric
31
333 - Economics of land & energy
28
600 - Technology
27
301 - Sociology & anthropology
24
530 - Physics
20
400 - Language
19
120 - Epistemology, causation & humankind
18
380 - Commerce, communications & transportation
18
581 - Specific topics in natural history
14
000 - Computer science, information & general works
13
363 - Other social problems & services
13
610 - Medicine & health
13
410 - Linguistics
12
296 - Judaism
11
576 - Genetics & evolution
10
780 - Music
10
620 - Engineering & allied operations
7
160 - Logic
6
551 - Geology, hydrology & meteorology
6
304 - Factors affecting social behavior
5
770 - Photography, photographs & computer art
5
364 - Criminology
4
500 - Natural sciences & mathematics
4
630 - Agriculture & related technologies
4
297 - Islam, Babism & Bahai Faith
3
414 - Phonology & phonetics
3
350 - Public administration & military science
2
398 - Folklore
2
580 - Plants (Botany)
2
658 - General management
2
720 - Architecture
2
361 - Social problems & social welfare in general
1
520 - Astronomy & allied sciences
1
657 - Accounting
1
791 - Public performances
1
880 - Hellenic literatures; classical Greek
1