Classification
000 - Computer science, information & general works
57
004 - Data processing & computer science
5
011 - Bibliographies
1
140 - Specific philosophical schools
23
158 - Applied psychology
1
160 - Logic
1
170 - Ethics
2
200 - Religion
2
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
14
301 - Sociology & anthropology
1
302 - Social interaction
2
304 - Factors affecting social behavior
13
320 - Political science
281
330 - Economics
331 - Labor economics
2
333 - Economics of land & energy
114
336 - Public finance
4
338 - Production
1
340 - Law
47
361 - Social problems & social welfare in general
3
363 - Other social problems & services
119
370 - Education
16
380 - Commerce, communications & transportation
229
381 - Commerce
2
384 - Communications; telecommunication
6
387 - Water, air & space transportation
2
388 - Transportation; ground transportation
10
400 - Language
2
410 - Linguistics
4
414 - Phonology & phonetics
5
500 - Natural sciences & mathematics
24
530 - Physics
7
540 - Chemistry & allied sciences
2
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
26
576 - Genetics & evolution
17
580 - Plants (Botany)
12
581 - Specific topics in natural history
4
600 - Technology
73
610 - Medicine & health
35
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
620 - Engineering & allied operations
45
621 - Applied physics
1
629 - Other branches of engineering
1
630 - Agriculture & related technologies
14
650 - Management & auxiliary services
2
657 - Accounting
4
658 - General management
34
more ...