Classification
600 - Technology
620 - Engineering & allied operations
1,795
900 - History & geography
700 - The arts; fine & decorative arts
830
333 - Economics of land & energy
644
363 - Other social problems & services
338
380 - Commerce, communications & transportation
288
000 - Computer science, information & general works
257
330 - Economics
244
610 - Medicine & health
189
580 - Plants (Botany)
168
140 - Specific philosophical schools
128
576 - Genetics & evolution
122
500 - Natural sciences & mathematics
80
630 - Agriculture & related technologies
78
551 - Geology, hydrology & meteorology
77
720 - Architecture
75
340 - Law
72
320 - Political science
69
414 - Phonology & phonetics
62
800 - Literature & rhetoric
56
370 - Education
52
540 - Chemistry & allied sciences
47
658 - General management
40
530 - Physics
34
300 - Social sciences
31
400 - Language
31
581 - Specific topics in natural history
27
100 - Philosophy & psychology
25
304 - Factors affecting social behavior
23
410 - Linguistics
16
780 - Music
12
770 - Photography, photographs & computer art
11
170 - Ethics
10
550 - Earth sciences
8
612 - Human physiology
7
200 - Religion
5
361 - Social problems & social welfare in general
5
657 - Accounting
5
301 - Sociology & anthropology
4
120 - Epistemology, causation & humankind
3
615 - Pharmacology & therapeutics
3
160 - Logic
2
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
364 - Criminology
1
520 - Astronomy & allied sciences
1
650 - Management & auxiliary services
1