Classification
000 - Computer science, information & general works
5
004 - Data processing & computer science
3
005 - Computer programming, programs & data
2
006 - Special computer methods
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
170 - Ethics
1
174 - Occupational ethics
1
320 - Political science
2
327 - International relations
1
330 - Economics
8
333 - Economics of land & energy
74
338 - Production
60
340 - Law
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
7
380 - Commerce, communications & transportation
5
388 - Transportation; ground transportation
3
400 - Language
1
500 - Natural sciences & mathematics
2
501 - Philosophy & theory
1
519 - Probabilities & applied mathematics
5
526 - Mathematical geography
1
530 - Physics
2
531 - Classical mechanics; solid mechanics
5
536 - Heat
1
539 - Modern physics
2
541 - Physical chemistry
3
546 - Inorganic chemistry
2
549 - Mineralogy
1
550 - Earth sciences
2
551 - Geology, hydrology & meteorology
5
553 - Economic geology
3
570 - Life sciences; biology
1
572 - Biochemistry
1
576 - Genetics & evolution
1
577 - Ecology
6
579 - Microorganisms, fungi & algae
7
580 - Plants (Botany)
4
600 - Technology
9
620 - Engineering & allied operations
44
621 - Applied physics
262
624 - Civil engineering
6
627 - Hydraulic engineering
2
628 - Sanitary & municipal engineering
4
629 - Other branches of engineering
4
630 - Agriculture & related technologies
2
631 - Techniques, equipment & materials
1
634 - Orchards, fruits & forestry
1
650 - Management & auxiliary services
2
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