Classification
320 - Political science
39
330 - Economics
12
341 - Law of nations
10
343 - Military, tax, trade & industrial law
7
328 - The legislative process
6
658 - General management
6
306 - Culture & institutions
5
332 - Financial economics
4
338 - Production
4
340 - Law
4
300 - Social sciences
3
324 - The political process
3
331 - Labor economics
3
333 - Economics of land & energy
3
337 - International economics
3
519 - Probabilities & applied mathematics
3
700 - The arts; fine & decorative arts
3
000 - Computer science, information & general works
2
004 - Data processing & computer science
2
005 - Computer programming, programs & data
2
327 - International relations
2
342 - Constitutional & administrative law
2
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
2
610 - Medicine & health
2
003 - Systems
1
006 - Special computer methods
1
100 - Philosophy & psychology
1
301 - Sociology & anthropology
1
302 - Social interaction
1
303 - Social processes
1
305 - Social groups
1
323 - Civil & political rights
1
344 - Labor, social, education & cultural law
1
346 - Private law
1
348 - Laws, regulations & cases
1
364 - Criminology
1
370 - Education
1
387 - Water, air & space transportation
1
400 - Language
1
404 - Special topics
1
410 - Linguistics
1
414 - Phonology & phonetics
1
570 - Life sciences; biology
1
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
641 - Food & drink
1
662 - Explosives, fuels & related products
1
664 - Food technology
1