Classification
820 - English & Old English literatures
551
330 - Economics
532
320 - Political science
395
780 - Music
334
900 - History & geography
319
850 - Italian, Romanian & related literatures
294
700 - The arts; fine & decorative arts
141
006 - Special computer methods
131
800 - Literature & rhetoric
131
340 - Law
113
370 - Education
113
300 - Social sciences
108
610 - Medicine & health
99
658 - General management
97
333 - Economics of land & energy
96
410 - Linguistics
93
650 - Management & auxiliary services
93
304 - Factors affecting social behavior
88
400 - Language
85
616 - Diseases
85
338 - Production
75
420 - English & Old English
65
004 - Data processing & computer science
61
940 - History of Europe
60
020 - Library & information sciences
59
380 - Commerce, communications & transportation
59
363 - Other social problems & services
58
450 - Italian, Romanian & related languages
57
005 - Computer programming, programs & data
56
306 - Culture & institutions
56
620 - Engineering & allied operations
56
720 - Architecture
56
600 - Technology
55
140 - Specific philosophical schools
54
010 - Bibliography
48
945 - Italian Peninsula & adjacent islands
47
000 - Computer science, information & general works
46
621 - Applied physics
43
301 - Sociology & anthropology
40
519 - Probabilities & applied mathematics
39
551 - Geology, hydrology & meteorology
39
332 - Financial economics
38
510 - Mathematics
37
100 - Philosophy & psychology
36
530 - Physics
36
809 - History, description & criticism
36
305 - Social groups
32
200 - Religion
30
617 - Surgery & related medical specialties
30
003 - Systems
29
more ...