Classification
005 - Computer programming, programs & data
1,702
331 - Labor economics
1,067
658 - General management
344
374 - Adult education
261
500 - Natural sciences & mathematics
250
000 - Computer science, information & general works
204
004 - Data processing & computer science
162
364 - Criminology
161
620 - Engineering & allied operations
142
330 - Economics
135
384 - Communications; telecommunication
133
338 - Production
90
363 - Other social problems & services
40
006 - Special computer methods
37
300 - Social sciences
31
621 - Applied physics
30
368 - Insurance
29
302 - Social interaction
25
381 - Commerce
24
600 - Technology
22
745 - Decorative arts
20
670 - Manufacturing
19
332 - Financial economics
15
570 - Life sciences; biology
10
343 - Military, tax, trade & industrial law
9
510 - Mathematics
9
001 - Knowledge
8
346 - Private law
7
003 - Systems
6
629 - Other branches of engineering
6
700 - The arts; fine & decorative arts
6
025 - Library operations
5
333 - Economics of land & energy
5
519 - Probabilities & applied mathematics
5
610 - Medicine & health
5
657 - Accounting
5
320 - Political science
4
340 - Law
4
380 - Commerce, communications & transportation
4
158 - Applied psychology
3
303 - Social processes
3
323 - Civil & political rights
3
327 - International relations
3
345 - Criminal law
3
813 - American fiction in English
3
100 - Philosophy & psychology
2
170 - Ethics
2
305 - Social groups
2
342 - Constitutional & administrative law
2
352 - General considerations of public administration
2
more ...