Classification
001 - Knowledge
6
003 - Systems
3
004 - Data processing & computer science
22
005 - Computer programming, programs & data
24
006 - Special computer methods
19
025 - Library operations
1
040 - [Unassigned]
3
057 - Serials in Slavic languages
1
100 - Philosophy & psychology
2
120 - Epistemology, causation & humankind
1
150 - Psychology
1
155 - Differential & developmental psychology
1
160 - Logic
1
170 - Ethics
1
300 - Social sciences
7
301 - Sociology & anthropology
8
302 - Social interaction
1
304 - Factors affecting social behavior
13
305 - Social groups
2
306 - Culture & institutions
6
320 - Political science
4
330 - Economics
42
331 - Labor economics
4
332 - Financial economics
3
333 - Economics of land & energy
6
336 - Public finance
1
337 - International economics
1
338 - Production
6
340 - Law
1
342 - Constitutional & administrative law
1
343 - Military, tax, trade & industrial law
1
361 - Social problems & social welfare in general
2
362 - Social welfare problems & services
1
364 - Criminology
3
368 - Insurance
1
371 - Schools & their activities; special education
3
372 - Elementary education
1
374 - Adult education
1
378 - Higher education
1
379 - Public policy issues in education
2
380 - Commerce, communications & transportation
1
381 - Commerce
1
384 - Communications; telecommunication
1
418 - Standard usage & applied linguistics
2
500 - Natural sciences & mathematics
3
501 - Philosophy & theory
2
510 - Mathematics
4
511 - General principles of mathematics
2
515 - Analysis
1
516 - Geometry
1
more ...