Classification
100 - Philosophy & psychology
18
006 - Special computer methods
9
004 - Data processing & computer science
8
005 - Computer programming, programs & data
8
370 - Education
8
400 - Language
8
040 - [Unassigned]
5
128 - Humankind
5
333 - Economics of land & energy
5
000 - Computer science, information & general works
4
658 - General management
4
120 - Epistemology, causation & humankind
3
153 - Mental processes & intelligence
3
301 - Sociology & anthropology
3
410 - Linguistics
3
500 - Natural sciences & mathematics
3
570 - Life sciences; biology
3
576 - Genetics & evolution
3
612 - Human physiology
3
629 - Other branches of engineering
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
2
330 - Economics
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
510 - Mathematics
2
581 - Specific topics in natural history
2
600 - Technology
2
610 - Medicine & health
2
781 - General principles & musical forms
2
900 - History & geography
2
001 - Knowledge
1
025 - Library operations
1
142 - Critical philosophy
1
152 - Perception, movement, emotions & drives
1
155 - Differential & developmental psychology
1
300 - Social sciences
1
302 - Social interaction
1
303 - Social processes
1
305 - Social groups
1
306 - Culture & institutions
1
371 - Schools & their activities; special education
1
381 - Commerce
1
401 - Philosophy & theory
1
415 - Grammar
1
418 - Standard usage & applied linguistics
1
507 - Education, research & related topics
1
519 - Probabilities & applied mathematics
1
530 - Physics
1
620 - Engineering & allied operations
1
more ...