Classification
330 - Economics
20
700 - The arts; fine & decorative arts
12
900 - History & geography
12
320 - Political science
9
300 - Social sciences
8
340 - Law
7
140 - Specific philosophical schools
6
100 - Philosophy & psychology
5
338 - Production
5
200 - Religion
4
302 - Social interaction
4
301 - Sociology & anthropology
3
305 - Social groups
3
346 - Private law
3
511 - General principles of mathematics
3
658 - General management
3
006 - Special computer methods
2
128 - Humankind
2
153 - Mental processes & intelligence
2
324 - The political process
2
331 - Labor economics
2
620 - Engineering & allied operations
2
770 - Photography, photographs & computer art
2
000 - Computer science, information & general works
1
004 - Data processing & computer science
1
150 - Psychology
1
160 - Logic
1
170 - Ethics
1
174 - Occupational ethics
1
193 - Philosophy of Germany & Austria
1
222 - Historical books of Old Testament
1
225 - New Testament
1
230 - Christianity & Christian theology
1
306 - Culture & institutions
1
332 - Financial economics
1
333 - Economics of land & energy
1
342 - Constitutional & administrative law
1
343 - Military, tax, trade & industrial law
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
370 - Education
1
381 - Commerce
1
400 - Language
1
407 - Education, research & related topics
1
410 - Linguistics
1
411 - Writing systems
1
414 - Phonology & phonetics
1
417 - Dialectology & historical linguistics
1
495 - Languages of East & Southeast Asia
1
500 - Natural sciences & mathematics
1
more ...