Classification
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
1,038
900 - History & geography
833
333 - Economics of land & energy
490
000 - Computer science, information & general works
275
363 - Other social problems & services
262
380 - Commerce, communications & transportation
221
610 - Medicine & health
211
330 - Economics
189
580 - Plants (Botany)
168
140 - Specific philosophical schools
128
576 - Genetics & evolution
116
630 - Agriculture & related technologies
84
720 - Architecture
79
500 - Natural sciences & mathematics
73
551 - Geology, hydrology & meteorology
59
414 - Phonology & phonetics
57
340 - Law
54
540 - Chemistry & allied sciences
54
370 - Education
51
320 - Political science
50
400 - Language
35
658 - General management
34
530 - Physics
33
800 - Literature & rhetoric
33
581 - Specific topics in natural history
22
100 - Philosophy & psychology
20
300 - Social sciences
16
612 - Human physiology
15
304 - Factors affecting social behavior
14
410 - Linguistics
12
170 - Ethics
11
780 - Music
10
770 - Photography, photographs & computer art
8
361 - Social problems & social welfare in general
7
657 - Accounting
5
791 - Public performances
4
615 - Pharmacology & therapeutics
3
200 - Religion
2
301 - Sociology & anthropology
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
360 - Social problems & services; associations
1
398 - Folklore
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1