Classification
330 - Economics
350
320 - Political science
261
820 - English & Old English literatures
195
900 - History & geography
194
004 - Data processing & computer science
190
005 - Computer programming, programs & data
187
006 - Special computer methods
161
333 - Economics of land & energy
117
304 - Factors affecting social behavior
90
610 - Medicine & health
81
551 - Geology, hydrology & meteorology
78
363 - Other social problems & services
77
700 - The arts; fine & decorative arts
74
620 - Engineering & allied operations
62
370 - Education
60
300 - Social sciences
59
658 - General management
51
340 - Law
49
616 - Diseases
48
003 - Systems
41
338 - Production
40
306 - Culture & institutions
39
938 - Greece to 323
38
000 - Computer science, information & general works
36
336 - Public finance
35
301 - Sociology & anthropology
34
930 - History of ancient world to ca. 499
34
970 - History of North America
34
380 - Commerce, communications & transportation
33
600 - Technology
33
800 - Literature & rhetoric
32
880 - Hellenic literatures; classical Greek
31
025 - Library operations
29
530 - Physics
28
621 - Applied physics
28
630 - Agriculture & related technologies
28
200 - Religion
27
040 - [Unassigned]
26
550 - Earth sciences
26
577 - Ecology
25
500 - Natural sciences & mathematics
24
580 - Plants (Botany)
24
520 - Astronomy & allied sciences
23
100 - Philosophy & psychology
22
371 - Schools & their activities; special education
21
470 - Italic languages; Latin
21
332 - Financial economics
20
920 - Biography, genealogy & insignia
19
510 - Mathematics
18
650 - Management & auxiliary services
18
more ...