Classification
800 - Literature & rhetoric
900 - History & geography
821
330 - Economics
321
896 - African literatures
318
320 - Political science
317
700 - The arts; fine & decorative arts
279
600 - Technology
126
000 - Computer science, information & general works
123
140 - Specific philosophical schools
120
100 - Philosophy & psychology
113
400 - Language
110
300 - Social sciences
104
363 - Other social problems & services
95
200 - Religion
94
333 - Economics of land & energy
92
410 - Linguistics
88
610 - Medicine & health
87
620 - Engineering & allied operations
70
380 - Commerce, communications & transportation
64
370 - Education
59
340 - Law
50
658 - General management
46
576 - Genetics & evolution
45
580 - Plants (Botany)
42
170 - Ethics
37
301 - Sociology & anthropology
37
500 - Natural sciences & mathematics
35
720 - Architecture
33
304 - Factors affecting social behavior
31
338 - Production
29
780 - Music
28
158 - Applied psychology
27
551 - Geology, hydrology & meteorology
27
650 - Management & auxiliary services
27
297 - Islam, Babism & Bahai Faith
22
398 - Folklore
22
581 - Specific topics in natural history
21
530 - Physics
18
630 - Agriculture & related technologies
18
332 - Financial economics
14
414 - Phonology & phonetics
13
540 - Chemistry & allied sciences
13
791 - Public performances
13
296 - Judaism
12
770 - Photography, photographs & computer art
9
001 - Knowledge
7
120 - Epistemology, causation & humankind
7
381 - Commerce
6
891 - East Indo-European & Celtic literatures
6
361 - Social problems & social welfare in general
5
more ...