Classification
370 - Education
259
371 - Schools & their activities; special education
201
780 - Music
96
330 - Economics
82
658 - General management
75
340 - Law
70
745 - Decorative arts
56
507 - Education, research & related topics
52
500 - Natural sciences & mathematics
47
510 - Mathematics
46
300 - Social sciences
41
781 - General principles & musical forms
36
600 - Technology
31
000 - Computer science, information & general works
27
005 - Computer programming, programs & data
24
333 - Economics of land & energy
23
400 - Language
23
100 - Philosophy & psychology
22
540 - Chemistry & allied sciences
22
004 - Data processing & computer science
21
320 - Political science
19
900 - History & geography
19
700 - The arts; fine & decorative arts
18
620 - Engineering & allied operations
17
363 - Other social problems & services
15
331 - Labor economics
14
302 - Social interaction
13
410 - Linguistics
13
140 - Specific philosophical schools
11
378 - Higher education
11
384 - Communications; telecommunication
11
610 - Medicine & health
11
670 - Manufacturing
11
372 - Elementary education
10
006 - Special computer methods
9
374 - Adult education
8
380 - Commerce, communications & transportation
8
381 - Commerce
8
782 - Vocal music
8
304 - Factors affecting social behavior
7
306 - Culture & institutions
7
379 - Public policy issues in education
7
657 - Accounting
7
800 - Literature & rhetoric
7
150 - Psychology
6
519 - Probabilities & applied mathematics
6
630 - Agriculture & related technologies
6
820 - English & Old English literatures
6
001 - Knowledge
5
338 - Production
5
more ...