Classification
000 - Computer science, information & general works
3
001 - Knowledge
2
003 - Systems
49
004 - Data processing & computer science
181
005 - Computer programming, programs & data
256
006 - Special computer methods
81
020 - Library & information sciences
1
025 - Library operations
18
040 - [Unassigned]
6
051 - Serials in American English
1
062 - Organizations in British Isles; in England
2
140 - Specific philosophical schools
1
170 - Ethics
1
174 - Occupational ethics
2
300 - Social sciences
2
302 - Social interaction
2
303 - Social processes
11
304 - Factors affecting social behavior
2
305 - Social groups
1
320 - Political science
1
323 - Civil & political rights
1
330 - Economics
140
331 - Labor economics
1
332 - Financial economics
3
333 - Economics of land & energy
6
336 - Public finance
1
338 - Production
16
339 - Macroeconomics & related topics
2
340 - Law
1
343 - Military, tax, trade & industrial law
4
346 - Private law
4
351 - Public administration
2
362 - Social welfare problems & services
2
363 - Other social problems & services
1
370 - Education
1
371 - Schools & their activities; special education
4
380 - Commerce, communications & transportation
1
381 - Commerce
159
500 - Natural sciences & mathematics
5
512 - Algebra
1
518 - Numerical analysis
3
519 - Probabilities & applied mathematics
1
547 - Organic chemistry
1
570 - Life sciences; biology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
600 - Technology
6
610 - Medicine & health
5
617 - Surgery & related medical specialties
1
620 - Engineering & allied operations
11
more ...