Classification
576 - Genetics & evolution
900 - History & geography
330 - Economics
375
320 - Political science
365
600 - Technology
128
620 - Engineering & allied operations
124
700 - The arts; fine & decorative arts
124
333 - Economics of land & energy
75
300 - Social sciences
64
000 - Computer science, information & general works
48
363 - Other social problems & services
41
380 - Commerce, communications & transportation
37
140 - Specific philosophical schools
28
340 - Law
26
580 - Plants (Botany)
23
610 - Medicine & health
22
800 - Literature & rhetoric
19
100 - Philosophy & psychology
17
500 - Natural sciences & mathematics
17
720 - Architecture
16
414 - Phonology & phonetics
15
370 - Education
13
581 - Specific topics in natural history
12
304 - Factors affecting social behavior
11
200 - Religion
10
301 - Sociology & anthropology
10
530 - Physics
10
400 - Language
9
551 - Geology, hydrology & meteorology
8
630 - Agriculture & related technologies
7
540 - Chemistry & allied sciences
6
658 - General management
6
410 - Linguistics
4
780 - Music
4
170 - Ethics
3
297 - Islam, Babism & Bahai Faith
3
770 - Photography, photographs & computer art
3
120 - Epistemology, causation & humankind
2
296 - Judaism
2
361 - Social problems & social welfare in general
2
650 - Management & auxiliary services
2
791 - Public performances
2
343 - Military, tax, trade & industrial law
1
350 - Public administration & military science
1
364 - Criminology
1
550 - Earth sciences
1
973 - United States
1