Classification
000 - Computer science, information & general works
145
001 - Knowledge
4
004 - Data processing & computer science
18
005 - Computer programming, programs & data
14
006 - Special computer methods
9
011 - Bibliographies
226
025 - Library operations
3
028 - Reading & use of other information media
1
070 - News media, journalism & publishing
11
115 - Time
1
128 - Humankind
1
150 - Psychology
2
152 - Perception, movement, emotions & drives
1
153 - Mental processes & intelligence
4
155 - Differential & developmental psychology
1
158 - Applied psychology
3
235 - Spiritual beings
1
271 - Religious orders in church history
1
300 - Social sciences
2
302 - Social interaction
7
305 - Social groups
1
306 - Culture & institutions
1
327 - International relations
1
330 - Economics
18
331 - Labor economics
16
332 - Financial economics
5
338 - Production
5
343 - Military, tax, trade & industrial law
1
346 - Private law
1
372 - Elementary education
2
374 - Adult education
2
380 - Commerce, communications & transportation
4
381 - Commerce
3
384 - Communications; telecommunication
9
388 - Transportation; ground transportation
1
500 - Natural sciences & mathematics
11
502 - Miscellany
1
514 - Topology
1
519 - Probabilities & applied mathematics
4
530 - Physics
4
540 - Chemistry & allied sciences
1
541 - Physical chemistry
1
547 - Organic chemistry
1
551 - Geology, hydrology & meteorology
3
571 - Physiology & related subjects
1
572 - Biochemistry
1
574 - [Unassigned]
1
577 - Ecology
5
595 - Arthropods
1
597 - Cold-blooded vertebrates; fishes
1
more ...