Classification
370 - Education
46
302 - Social interaction
22
100 - Philosophy & psychology
17
700 - The arts; fine & decorative arts
13
600 - Technology
10
300 - Social sciences
9
380 - Commerce, communications & transportation
9
900 - History & geography
6
000 - Computer science, information & general works
5
333 - Economics of land & energy
5
320 - Political science
4
800 - Literature & rhetoric
4
140 - Specific philosophical schools
3
340 - Law
3
610 - Medicine & health
3
780 - Music
3
070 - News media, journalism & publishing
2
120 - Epistemology, causation & humankind
2
200 - Religion
2
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
330 - Economics
2
363 - Other social problems & services
2
371 - Schools & their activities; special education
2
500 - Natural sciences & mathematics
2
510 - Mathematics
2
581 - Specific topics in natural history
2
791 - Public performances
2
006 - Special computer methods
1
158 - Applied psychology
1
170 - Ethics
1
175 - Ethics of recreation & leisure
1
297 - Islam, Babism & Bahai Faith
1
303 - Social processes
1
306 - Culture & institutions
1
323 - Civil & political rights
1
361 - Social problems & social welfare in general
1
378 - Higher education
1
379 - Public policy issues in education
1
400 - Language
1
418 - Standard usage & applied linguistics
1
507 - Education, research & related topics
1
620 - Engineering & allied operations
1
658 - General management
1