Classification
005 - Computer programming, programs & data
2,148
620 - Engineering & allied operations
857
004 - Data processing & computer science
676
658 - General management
602
500 - Natural sciences & mathematics
477
331 - Labor economics
406
000 - Computer science, information & general works
356
745 - Decorative arts
250
006 - Special computer methods
226
330 - Economics
153
384 - Communications; telecommunication
80
510 - Mathematics
64
600 - Technology
59
302 - Social interaction
50
519 - Probabilities & applied mathematics
45
374 - Adult education
40
338 - Production
38
381 - Commerce
28
003 - Systems
24
518 - Numerical analysis
21
300 - Social sciences
18
001 - Knowledge
16
332 - Financial economics
16
364 - Criminology
16
621 - Applied physics
15
650 - Management & auxiliary services
15
670 - Manufacturing
15
512 - Algebra
13
794 - Indoor games of skill
12
515 - Analysis
10
629 - Other branches of engineering
10
770 - Photography, photographs & computer art
10
025 - Library operations
8
303 - Social processes
6
516 - Geometry
6
570 - Life sciences; biology
6
910 - Geography & travel
6
011 - Bibliographies
5
346 - Private law
5
153 - Mental processes & intelligence
4
368 - Insurance
4
380 - Commerce, communications & transportation
4
530 - Physics
4
610 - Medicine & health
4
651 - Office services
4
813 - American fiction in English
4
158 - Applied psychology
3
371 - Schools & their activities; special education
3
541 - Physical chemistry
3
741 - Drawing & drawings
3
more ...