Classification
400 - Language
410 - Linguistics
787
700 - The arts; fine & decorative arts
424
900 - History & geography
405
370 - Education
224
800 - Literature & rhetoric
220
100 - Philosophy & psychology
193
000 - Computer science, information & general works
159
380 - Commerce, communications & transportation
131
320 - Political science
117
600 - Technology
114
140 - Specific philosophical schools
105
333 - Economics of land & energy
101
300 - Social sciences
92
414 - Phonology & phonetics
88
500 - Natural sciences & mathematics
82
200 - Religion
74
340 - Law
68
330 - Economics
65
620 - Engineering & allied operations
64
610 - Medicine & health
59
301 - Sociology & anthropology
52
363 - Other social problems & services
49
304 - Factors affecting social behavior
42
576 - Genetics & evolution
40
780 - Music
31
170 - Ethics
20
720 - Architecture
19
120 - Epistemology, causation & humankind
18
297 - Islam, Babism & Bahai Faith
18
530 - Physics
17
580 - Plants (Botany)
16
398 - Folklore
12
551 - Geology, hydrology & meteorology
10
581 - Specific topics in natural history
10
658 - General management
10
630 - Agriculture & related technologies
8
296 - Judaism
5
540 - Chemistry & allied sciences
5
770 - Photography, photographs & computer art
5
160 - Logic
4
361 - Social problems & social welfare in general
4
791 - Public performances
4
615 - Pharmacology & therapeutics
3
350 - Public administration & military science
2
360 - Social problems & services; associations
2
657 - Accounting
2
364 - Criminology
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
more ...