Classification
658 - General management
970
330 - Economics
754
600 - Technology
291
700 - The arts; fine & decorative arts
280
331 - Labor economics
278
302 - Social interaction
273
300 - Social sciences
263
620 - Engineering & allied operations
234
000 - Computer science, information & general works
233
333 - Economics of land & energy
206
900 - History & geography
195
791 - Public performances
189
384 - Communications; telecommunication
170
500 - Natural sciences & mathematics
169
381 - Commerce
146
380 - Commerce, communications & transportation
138
610 - Medicine & health
116
670 - Manufacturing
113
363 - Other social problems & services
97
650 - Management & auxiliary services
94
338 - Production
93
777 - [Unassigned]
92
580 - Plants (Botany)
77
158 - Applied psychology
71
006 - Special computer methods
65
140 - Specific philosophical schools
60
320 - Political science
57
576 - Genetics & evolution
54
340 - Law
43
370 - Education
36
153 - Mental processes & intelligence
34
530 - Physics
34
540 - Chemistry & allied sciences
33
551 - Geology, hydrology & meteorology
33
800 - Literature & rhetoric
32
778 - Fields & kinds of photography
29
781 - General principles & musical forms
27
770 - Photography, photographs & computer art
25
792 - Stage presentations
25
414 - Phonology & phonetics
24
630 - Agriculture & related technologies
24
659 - Advertising & public relations
23
170 - Ethics
21
621 - Applied physics
21
070 - News media, journalism & publishing
20
304 - Factors affecting social behavior
20
150 - Psychology
18
332 - Financial economics
18
374 - Adult education
18
100 - Philosophy & psychology
17
more ...