Classification
900 - History & geography
620 - Engineering & allied operations
1,835
600 - Technology
1,796
700 - The arts; fine & decorative arts
853
333 - Economics of land & energy
656
363 - Other social problems & services
346
380 - Commerce, communications & transportation
294
330 - Economics
271
000 - Computer science, information & general works
269
610 - Medicine & health
193
580 - Plants (Botany)
170
140 - Specific philosophical schools
146
576 - Genetics & evolution
124
320 - Political science
99
720 - Architecture
98
630 - Agriculture & related technologies
93
500 - Natural sciences & mathematics
91
551 - Geology, hydrology & meteorology
80
340 - Law
75
370 - Education
65
414 - Phonology & phonetics
64
540 - Chemistry & allied sciences
56
800 - Literature & rhetoric
56
658 - General management
41
300 - Social sciences
37
400 - Language
35
530 - Physics
34
581 - Specific topics in natural history
26
100 - Philosophy & psychology
25
304 - Factors affecting social behavior
24
410 - Linguistics
14
780 - Music
12
170 - Ethics
11
770 - Photography, photographs & computer art
11
550 - Earth sciences
8
301 - Sociology & anthropology
7
612 - Human physiology
7
200 - Religion
6
590 - Animals (Zoology)
6
657 - Accounting
6
361 - Social problems & social welfare in general
5
120 - Epistemology, causation & humankind
4
297 - Islam, Babism & Bahai Faith
3
615 - Pharmacology & therapeutics
3
160 - Logic
2
360 - Social problems & services; associations
2
336 - Public finance
1
350 - Public administration & military science
1
364 - Criminology
1
520 - Astronomy & allied sciences
1
more ...