Classification
384 - Communications; telecommunication
658 - General management
1,257
331 - Labor economics
1,060
330 - Economics
991
500 - Natural sciences & mathematics
985
620 - Engineering & allied operations
931
380 - Commerce, communications & transportation
709
302 - Social interaction
576
004 - Data processing & computer science
524
005 - Computer programming, programs & data
516
621 - Applied physics
466
300 - Social sciences
299
000 - Computer science, information & general works
277
745 - Decorative arts
262
006 - Special computer methods
252
338 - Production
222
374 - Adult education
198
381 - Commerce
159
650 - Management & auxiliary services
128
670 - Manufacturing
128
808 - Rhetoric & collections of literature
121
153 - Mental processes & intelligence
98
158 - Applied psychology
93
791 - Public performances
84
150 - Psychology
53
303 - Social processes
51
651 - Office services
50
659 - Advertising & public relations
37
777 - [Unassigned]
35
155 - Differential & developmental psychology
30
740 - Drawing & decorative arts
25
778 - Fields & kinds of photography
25
001 - Knowledge
21
332 - Financial economics
20
770 - Photography, photographs & computer art
20
070 - News media, journalism & publishing
19
741 - Drawing & drawings
19
510 - Mathematics
18
781 - General principles & musical forms
17
364 - Criminology
12
519 - Probabilities & applied mathematics
12
600 - Technology
12
610 - Medicine & health
12
629 - Other branches of engineering
12
011 - Bibliographies
10
794 - Indoor games of skill
10
363 - Other social problems & services
9
371 - Schools & their activities; special education
9
170 - Ethics
8
681 - Precision instruments & other devices
8
more ...