Classification
000 - Computer science, information & general works
330 - Economics
647
333 - Economics of land & energy
262
363 - Other social problems & services
249
700 - The arts; fine & decorative arts
239
600 - Technology
201
658 - General management
158
380 - Commerce, communications & transportation
152
320 - Political science
130
620 - Engineering & allied operations
104
610 - Medicine & health
100
900 - History & geography
98
338 - Production
90
551 - Geology, hydrology & meteorology
88
140 - Specific philosophical schools
86
580 - Plants (Botany)
77
630 - Agriculture & related technologies
74
381 - Commerce
65
332 - Financial economics
63
300 - Social sciences
59
576 - Genetics & evolution
57
500 - Natural sciences & mathematics
51
340 - Law
37
581 - Specific topics in natural history
36
540 - Chemistry & allied sciences
35
370 - Education
33
100 - Philosophy & psychology
29
530 - Physics
28
800 - Literature & rhetoric
28
720 - Architecture
27
414 - Phonology & phonetics
20
304 - Factors affecting social behavior
19
302 - Social interaction
18
331 - Labor economics
17
400 - Language
17
384 - Communications; telecommunication
16
301 - Sociology & anthropology
13
170 - Ethics
12
410 - Linguistics
12
657 - Accounting
12
200 - Religion
11
011 - Bibliographies
10
361 - Social problems & social welfare in general
10
670 - Manufacturing
8
650 - Management & auxiliary services
7
153 - Mental processes & intelligence
6
297 - Islam, Babism & Bahai Faith
6
339 - Macroeconomics & related topics
5
519 - Probabilities & applied mathematics
5
612 - Human physiology
5
more ...