Classification
000 - Computer science, information & general works
14
004 - Data processing & computer science
20
005 - Computer programming, programs & data
7
006 - Special computer methods
2
100 - Philosophy & psychology
2
140 - Specific philosophical schools
14
170 - Ethics
1
190 - Modern western philosophy
1
200 - Religion
5
300 - Social sciences
6
301 - Sociology & anthropology
7
302 - Social interaction
3
303 - Social processes
1
304 - Factors affecting social behavior
4
306 - Culture & institutions
2
307 - Communities
2
320 - Political science
12
330 - Economics
7
331 - Labor economics
2
333 - Economics of land & energy
4
340 - Law
1
363 - Other social problems & services
8
370 - Education
4
380 - Commerce, communications & transportation
8
384 - Communications; telecommunication
1
400 - Language
1
410 - Linguistics
2
414 - Phonology & phonetics
6
500 - Natural sciences & mathematics
9
509 - Historical, geographic & persons treatment
1
510 - Mathematics
2
519 - Probabilities & applied mathematics
2
520 - Astronomy & allied sciences
17
523 - Specific celestial bodies & phenomena
2
526 - Mathematical geography
32
530 - Physics
1
539 - Modern physics
1
550 - Earth sciences
12
551 - Geology, hydrology & meteorology
11
577 - Ecology
1
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
600 - Technology
9
610 - Medicine & health
2
612 - Human physiology
1
620 - Engineering & allied operations
14
621 - Applied physics
2
629 - Other branches of engineering
3
630 - Agriculture & related technologies
2
658 - General management
2
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