Classification
000 - Computer science, information & general works
2
003 - Systems
2
004 - Data processing & computer science
14
006 - Special computer methods
14
100 - Philosophy & psychology
3
110 - Metaphysics
1
113 - Cosmology
1
120 - Epistemology, causation & humankind
3
126 - The self
1
140 - Specific philosophical schools
1
150 - Psychology
9
155 - Differential & developmental psychology
1
170 - Ethics
2
200 - Religion
1
300 - Social sciences
1
301 - Sociology & anthropology
21
304 - Factors affecting social behavior
2
305 - Social groups
1
306 - Culture & institutions
3
320 - Political science
2
330 - Economics
3
333 - Economics of land & energy
22
338 - Production
1
363 - Other social problems & services
2
364 - Criminology
1
380 - Commerce, communications & transportation
2
400 - Language
2
401 - Philosophy & theory
1
410 - Linguistics
2
500 - Natural sciences & mathematics
5
501 - Philosophy & theory
7
507 - Education, research & related topics
1
509 - Historical, geographic & persons treatment
2
510 - Mathematics
1
511 - General principles of mathematics
1
512 - Algebra
1
515 - Analysis
3
519 - Probabilities & applied mathematics
5
520 - Astronomy & allied sciences
8
523 - Specific celestial bodies & phenomena
1
530 - Physics
11
535 - Light & infrared & ultraviolet phenomena
1
540 - Chemistry & allied sciences
3
541 - Physical chemistry
2
547 - Organic chemistry
5
550 - Earth sciences
8
551 - Geology, hydrology & meteorology
11
560 - Paleontology; paleozoology
35
570 - Life sciences; biology
68
571 - Physiology & related subjects
80
more ...