Classification
374 - Adult education
103
370 - Education
90
306 - Culture & institutions
21
371 - Schools & their activities; special education
20
300 - Social sciences
14
158 - Applied psychology
13
378 - Higher education
12
658 - General management
12
333 - Economics of land & energy
8
320 - Political science
7
330 - Economics
7
379 - Public policy issues in education
7
600 - Technology
7
610 - Medicine & health
7
100 - Philosophy & psychology
6
150 - Psychology
6
418 - Standard usage & applied linguistics
6
650 - Management & auxiliary services
5
305 - Social groups
4
361 - Social problems & social welfare in general
4
700 - The arts; fine & decorative arts
4
301 - Sociology & anthropology
3
500 - Natural sciences & mathematics
3
616 - Diseases
3
621 - Applied physics
3
657 - Accounting
3
302 - Social interaction
2
338 - Production
2
363 - Other social problems & services
2
571 - Physiology & related subjects
2
620 - Engineering & allied operations
2
720 - Architecture
2
000 - Computer science, information & general works
1
001 - Knowledge
1
155 - Differential & developmental psychology
1
170 - Ethics
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
372 - Elementary education
1
400 - Language
1
410 - Linguistics
1
510 - Mathematics
1
516 - Geometry
1
607 - Education, research & related topics
1
613 - Personal health & safety
1
634 - Orchards, fruits & forestry
1
796 - Athletic & outdoor sports & games
1
808 - Rhetoric & collections of literature
1
900 - History & geography
1
910 - Geography & travel
1