Classification
700 - The arts; fine & decorative arts
900 - History & geography
600 - Technology
873
620 - Engineering & allied operations
833
333 - Economics of land & energy
451
330 - Economics
346
320 - Political science
297
363 - Other social problems & services
229
000 - Computer science, information & general works
227
380 - Commerce, communications & transportation
203
140 - Specific philosophical schools
169
610 - Medicine & health
155
580 - Plants (Botany)
128
576 - Genetics & evolution
124
800 - Literature & rhetoric
118
720 - Architecture
110
300 - Social sciences
78
340 - Law
75
400 - Language
73
100 - Philosophy & psychology
71
370 - Education
64
500 - Natural sciences & mathematics
64
551 - Geology, hydrology & meteorology
61
200 - Religion
56
301 - Sociology & anthropology
54
780 - Music
52
410 - Linguistics
48
414 - Phonology & phonetics
48
630 - Agriculture & related technologies
44
581 - Specific topics in natural history
42
530 - Physics
39
540 - Chemistry & allied sciences
35
791 - Public performances
32
770 - Photography, photographs & computer art
27
658 - General management
25
170 - Ethics
22
304 - Factors affecting social behavior
19
297 - Islam, Babism & Bahai Faith
9
361 - Social problems & social welfare in general
8
612 - Human physiology
8
120 - Epistemology, causation & humankind
6
398 - Folklore
6
296 - Judaism
4
615 - Pharmacology & therapeutics
4
160 - Logic
3
520 - Astronomy & allied sciences
3
657 - Accounting
3
360 - Social problems & services; associations
2
550 - Earth sciences
2
590 - Animals (Zoology)
2
more ...