Classification
700 - The arts; fine & decorative arts
330 - Economics
549
600 - Technology
450
320 - Political science
333
620 - Engineering & allied operations
264
000 - Computer science, information & general works
246
333 - Economics of land & energy
241
900 - History & geography
218
363 - Other social problems & services
161
380 - Commerce, communications & transportation
131
610 - Medicine & health
127
630 - Agriculture & related technologies
107
140 - Specific philosophical schools
95
580 - Plants (Botany)
73
576 - Genetics & evolution
71
720 - Architecture
66
540 - Chemistry & allied sciences
59
300 - Social sciences
56
658 - General management
53
370 - Education
50
500 - Natural sciences & mathematics
42
551 - Geology, hydrology & meteorology
39
340 - Law
37
800 - Literature & rhetoric
29
400 - Language
28
581 - Specific topics in natural history
26
414 - Phonology & phonetics
23
100 - Philosophy & psychology
22
530 - Physics
16
170 - Ethics
14
304 - Factors affecting social behavior
12
780 - Music
12
301 - Sociology & anthropology
11
657 - Accounting
11
791 - Public performances
11
670 - Manufacturing
9
200 - Religion
7
361 - Social problems & social welfare in general
7
350 - Public administration & military science
6
612 - Human physiology
6
770 - Photography, photographs & computer art
6
297 - Islam, Babism & Bahai Faith
5
410 - Linguistics
5
160 - Logic
4
615 - Pharmacology & therapeutics
4
650 - Management & auxiliary services
4
006 - Special computer methods
3
338 - Production
3
360 - Social problems & services; associations
3
520 - Astronomy & allied sciences
3
more ...