Classification
500 - Natural sciences & mathematics
331 - Labor economics
160
006 - Special computer methods
143
000 - Computer science, information & general works
94
700 - The arts; fine & decorative arts
54
005 - Computer programming, programs & data
34
333 - Economics of land & energy
33
600 - Technology
33
620 - Engineering & allied operations
31
330 - Economics
24
610 - Medicine & health
23
363 - Other social problems & services
22
576 - Genetics & evolution
19
380 - Commerce, communications & transportation
17
900 - History & geography
17
140 - Specific philosophical schools
16
519 - Probabilities & applied mathematics
15
658 - General management
13
004 - Data processing & computer science
11
540 - Chemistry & allied sciences
11
153 - Mental processes & intelligence
10
580 - Plants (Botany)
10
320 - Political science
9
400 - Language
9
720 - Architecture
9
800 - Literature & rhetoric
9
300 - Social sciences
7
340 - Law
7
510 - Mathematics
7
551 - Geology, hydrology & meteorology
7
414 - Phonology & phonetics
6
530 - Physics
6
338 - Production
5
630 - Agriculture & related technologies
5
745 - Decorative arts
5
612 - Human physiology
4
302 - Social interaction
3
581 - Specific topics in natural history
3
629 - Other branches of engineering
3
670 - Manufacturing
3
001 - Knowledge
2
025 - Library operations
2
100 - Philosophy & psychology
2
370 - Education
2
381 - Commerce
2
410 - Linguistics
2
570 - Life sciences; biology
2
621 - Applied physics
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
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