Classification
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
600 - Technology
278
333 - Economics of land & energy
270
000 - Computer science, information & general works
232
620 - Engineering & allied operations
221
900 - History & geography
203
610 - Medicine & health
152
363 - Other social problems & services
138
330 - Economics
137
140 - Specific philosophical schools
113
320 - Political science
82
576 - Genetics & evolution
67
580 - Plants (Botany)
63
370 - Education
54
551 - Geology, hydrology & meteorology
53
500 - Natural sciences & mathematics
43
720 - Architecture
42
540 - Chemistry & allied sciences
39
340 - Law
36
400 - Language
35
658 - General management
34
530 - Physics
32
630 - Agriculture & related technologies
28
414 - Phonology & phonetics
26
800 - Literature & rhetoric
26
300 - Social sciences
21
304 - Factors affecting social behavior
20
100 - Philosophy & psychology
19
612 - Human physiology
18
581 - Specific topics in natural history
17
410 - Linguistics
12
791 - Public performances
10
361 - Social problems & social welfare in general
9
780 - Music
9
170 - Ethics
8
301 - Sociology & anthropology
7
615 - Pharmacology & therapeutics
7
200 - Religion
6
657 - Accounting
4
297 - Islam, Babism & Bahai Faith
2
520 - Astronomy & allied sciences
2
590 - Animals (Zoology)
2
650 - Management & auxiliary services
2
770 - Photography, photographs & computer art
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
336 - Public finance
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
more ...