Classification
620 - Engineering & allied operations
600 - Technology
554
900 - History & geography
445
700 - The arts; fine & decorative arts
349
333 - Economics of land & energy
280
000 - Computer science, information & general works
180
380 - Commerce, communications & transportation
151
330 - Economics
146
363 - Other social problems & services
136
500 - Natural sciences & mathematics
122
658 - General management
122
610 - Medicine & health
112
580 - Plants (Botany)
95
629 - Other branches of engineering
93
140 - Specific philosophical schools
74
630 - Agriculture & related technologies
65
576 - Genetics & evolution
61
621 - Applied physics
59
005 - Computer programming, programs & data
47
720 - Architecture
46
340 - Law
34
540 - Chemistry & allied sciences
31
320 - Political science
28
745 - Decorative arts
28
331 - Labor economics
27
551 - Geology, hydrology & meteorology
27
530 - Physics
26
414 - Phonology & phonetics
25
300 - Social sciences
24
384 - Communications; telecommunication
24
370 - Education
17
510 - Mathematics
16
400 - Language
15
800 - Literature & rhetoric
14
304 - Factors affecting social behavior
13
581 - Specific topics in natural history
13
004 - Data processing & computer science
11
670 - Manufacturing
11
302 - Social interaction
10
100 - Philosophy & psychology
9
170 - Ethics
8
338 - Production
8
781 - General principles & musical forms
8
006 - Special computer methods
7
519 - Probabilities & applied mathematics
7
612 - Human physiology
5
410 - Linguistics
4
650 - Management & auxiliary services
4
770 - Photography, photographs & computer art
4
003 - Systems
3
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