Classification
600 - Technology
658 - General management
330 - Economics
95
620 - Engineering & allied operations
72
000 - Computer science, information & general works
68
700 - The arts; fine & decorative arts
57
333 - Economics of land & energy
49
900 - History & geography
44
380 - Commerce, communications & transportation
40
363 - Other social problems & services
38
331 - Labor economics
32
610 - Medicine & health
30
140 - Specific philosophical schools
23
500 - Natural sciences & mathematics
23
338 - Production
22
576 - Genetics & evolution
21
580 - Plants (Botany)
19
005 - Computer programming, programs & data
18
320 - Political science
17
630 - Agriculture & related technologies
16
004 - Data processing & computer science
13
370 - Education
11
381 - Commerce
9
551 - Geology, hydrology & meteorology
9
800 - Literature & rhetoric
8
300 - Social sciences
7
720 - Architecture
7
745 - Decorative arts
6
340 - Law
5
410 - Linguistics
5
670 - Manufacturing
5
100 - Philosophy & psychology
4
302 - Social interaction
4
400 - Language
4
581 - Specific topics in natural history
4
629 - Other branches of engineering
4
650 - Management & auxiliary services
4
006 - Special computer methods
3
361 - Social problems & social welfare in general
3
384 - Communications; telecommunication
3
540 - Chemistry & allied sciences
3
153 - Mental processes & intelligence
2
332 - Financial economics
2
336 - Public finance
2
364 - Criminology
2
530 - Physics
2
651 - Office services
2
780 - Music
2
001 - Knowledge
1
160 - Logic
1
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