Classification
330 - Economics
700 - The arts; fine & decorative arts
320 - Political science
1,563
900 - History & geography
402
600 - Technology
362
333 - Economics of land & energy
352
000 - Computer science, information & general works
274
363 - Other social problems & services
256
340 - Law
192
620 - Engineering & allied operations
190
610 - Medicine & health
169
380 - Commerce, communications & transportation
148
140 - Specific philosophical schools
141
630 - Agriculture & related technologies
114
300 - Social sciences
101
370 - Education
85
658 - General management
83
551 - Geology, hydrology & meteorology
82
580 - Plants (Botany)
82
576 - Genetics & evolution
71
800 - Literature & rhetoric
50
500 - Natural sciences & mathematics
49
720 - Architecture
41
100 - Philosophy & psychology
39
400 - Language
34
581 - Specific topics in natural history
31
304 - Factors affecting social behavior
29
170 - Ethics
25
540 - Chemistry & allied sciences
24
361 - Social problems & social welfare in general
22
200 - Religion
19
530 - Physics
18
780 - Music
17
301 - Sociology & anthropology
15
414 - Phonology & phonetics
15
657 - Accounting
13
410 - Linguistics
12
791 - Public performances
12
005 - Computer programming, programs & data
10
770 - Photography, photographs & computer art
10
160 - Logic
7
297 - Islam, Babism & Bahai Faith
7
350 - Public administration & military science
7
360 - Social problems & services; associations
7
001 - Knowledge
6
338 - Production
6
612 - Human physiology
6
520 - Astronomy & allied sciences
4
615 - Pharmacology & therapeutics
4
650 - Management & auxiliary services
4
more ...