Classification
001 - Knowledge
1
003 - Systems
2
004 - Data processing & computer science
6
005 - Computer programming, programs & data
18
006 - Special computer methods
19
020 - Library & information sciences
1
025 - Library operations
3
115 - Time
1
146 - Naturalism & related systems
1
150 - Psychology
3
152 - Perception, movement, emotions & drives
5
153 - Mental processes & intelligence
12
154 - Subconscious & altered states
2
155 - Differential & developmental psychology
3
160 - Logic
3
174 - Occupational ethics
1
300 - Social sciences
1
302 - Social interaction
1
306 - Culture & institutions
1
330 - Economics
2
332 - Financial economics
4
333 - Economics of land & energy
11
337 - International economics
1
338 - Production
3
346 - Private law
1
349 - Law of specific jurisdictions & areas
1
355 - Military science
1
362 - Social welfare problems & services
2
363 - Other social problems & services
11
364 - Criminology
4
368 - Insurance
1
382 - International commerce
1
388 - Transportation; ground transportation
1
401 - Philosophy & theory
1
411 - Writing systems
1
415 - Grammar
1
495 - Languages of East & Southeast Asia
1
501 - Philosophy & theory
2
502 - Miscellany
2
510 - Mathematics
6
511 - General principles of mathematics
2
512 - Algebra
3
515 - Analysis
10
516 - Geometry
2
518 - Numerical analysis
5
519 - Probabilities & applied mathematics
16
523 - Specific celestial bodies & phenomena
4
530 - Physics
18
531 - Classical mechanics; solid mechanics
3
532 - Fluid mechanics; liquid mechanics
2
more ...