Classification
000 - Computer science, information & general works
6
001 - Knowledge
2
006 - Special computer methods
3
100 - Philosophy & psychology
64
120 - Epistemology, causation & humankind
3
140 - Specific philosophical schools
4
150 - Psychology
2
170 - Ethics
4
200 - Religion
8
297 - Islam, Babism & Bahai Faith
4
300 - Social sciences
69
301 - Sociology & anthropology
20
302 - Social interaction
3
303 - Social processes
1
304 - Factors affecting social behavior
19
305 - Social groups
5
306 - Culture & institutions
9
320 - Political science
26
330 - Economics
3
331 - Labor economics
1
333 - Economics of land & energy
10
338 - Production
1
340 - Law
6
360 - Social problems & services; associations
2
361 - Social problems & social welfare in general
4
363 - Other social problems & services
4
364 - Criminology
1
370 - Education
252
371 - Schools & their activities; special education
22
372 - Elementary education
11
374 - Adult education
9
376 - [Unassigned]
1
378 - Higher education
18
379 - Public policy issues in education
3
380 - Commerce, communications & transportation
5
400 - Language
9
410 - Linguistics
4
418 - Standard usage & applied linguistics
3
500 - Natural sciences & mathematics
7
507 - Education, research & related topics
6
510 - Mathematics
5
519 - Probabilities & applied mathematics
2
520 - Astronomy & allied sciences
1
530 - Physics
3
540 - Chemistry & allied sciences
4
542 - Techniques, equipment & materials
1
551 - Geology, hydrology & meteorology
2
571 - Physiology & related subjects
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
more ...