Classification
600 - Technology
1,597
900 - History & geography
759
610 - Medicine & health
571
320 - Political science
551
330 - Economics
531
700 - The arts; fine & decorative arts
519
100 - Philosophy & psychology
471
300 - Social sciences
464
340 - Law
328
333 - Economics of land & energy
320
370 - Education
317
658 - General management
294
363 - Other social problems & services
270
200 - Religion
266
005 - Computer programming, programs & data
242
620 - Engineering & allied operations
236
140 - Specific philosophical schools
224
800 - Literature & rhetoric
221
304 - Factors affecting social behavior
218
006 - Special computer methods
199
400 - Language
168
301 - Sociology & anthropology
166
380 - Commerce, communications & transportation
151
000 - Computer science, information & general works
150
500 - Natural sciences & mathematics
145
621 - Applied physics
116
170 - Ethics
112
410 - Linguistics
102
530 - Physics
101
331 - Labor economics
92
338 - Production
83
551 - Geology, hydrology & meteorology
69
580 - Plants (Botany)
67
581 - Specific topics in natural history
67
720 - Architecture
67
540 - Chemistry & allied sciences
66
630 - Agriculture & related technologies
61
780 - Music
61
302 - Social interaction
59
004 - Data processing & computer science
57
612 - Human physiology
57
306 - Culture & institutions
49
361 - Social problems & social welfare in general
49
297 - Islam, Babism & Bahai Faith
47
616 - Diseases
45
576 - Genetics & evolution
43
305 - Social groups
41
364 - Criminology
40
120 - Epistemology, causation & humankind
37
570 - Life sciences; biology
37
more ...