Classification
330 - Economics
684
005 - Computer programming, programs & data
284
000 - Computer science, information & general works
213
610 - Medicine & health
189
700 - The arts; fine & decorative arts
180
900 - History & geography
178
333 - Economics of land & energy
174
370 - Education
172
320 - Political science
164
658 - General management
161
331 - Labor economics
160
600 - Technology
152
620 - Engineering & allied operations
131
380 - Commerce, communications & transportation
129
140 - Specific philosophical schools
111
500 - Natural sciences & mathematics
111
100 - Philosophy & psychology
97
363 - Other social problems & services
81
300 - Social sciences
78
340 - Law
67
720 - Architecture
39
400 - Language
35
170 - Ethics
34
551 - Geology, hydrology & meteorology
33
304 - Factors affecting social behavior
31
800 - Literature & rhetoric
29
384 - Communications; telecommunication
27
580 - Plants (Botany)
23
004 - Data processing & computer science
22
576 - Genetics & evolution
22
745 - Decorative arts
21
630 - Agriculture & related technologies
20
301 - Sociology & anthropology
17
361 - Social problems & social welfare in general
17
350 - Public administration & military science
16
362 - Social welfare problems & services
16
200 - Religion
14
374 - Adult education
14
410 - Linguistics
14
530 - Physics
14
540 - Chemistry & allied sciences
12
780 - Music
12
120 - Epistemology, causation & humankind
10
621 - Applied physics
10
364 - Criminology
9
581 - Specific topics in natural history
9
791 - Public performances
9
070 - News media, journalism & publishing
8
338 - Production
8
297 - Islam, Babism & Bahai Faith
7
more ...