Classification
005 - Computer programming, programs & data
4,102
570 - Life sciences; biology
2,514
006 - Special computer methods
1,020
500 - Natural sciences & mathematics
878
000 - Computer science, information & general works
785
004 - Data processing & computer science
698
745 - Decorative arts
550
620 - Engineering & allied operations
501
331 - Labor economics
431
658 - General management
264
384 - Communications; telecommunication
157
330 - Economics
122
794 - Indoor games of skill
103
302 - Social interaction
79
621 - Applied physics
70
374 - Adult education
66
900 - History & geography
45
600 - Technology
41
003 - Systems
36
338 - Production
30
381 - Commerce
28
001 - Knowledge
27
300 - Social sciences
27
320 - Political science
27
333 - Economics of land & energy
21
629 - Other branches of engineering
20
910 - Geography & travel
20
670 - Manufacturing
19
700 - The arts; fine & decorative arts
19
518 - Numerical analysis
18
510 - Mathematics
17
519 - Probabilities & applied mathematics
16
551 - Geology, hydrology & meteorology
14
650 - Management & auxiliary services
14
363 - Other social problems & services
12
025 - Library operations
11
306 - Culture & institutions
11
530 - Physics
11
332 - Financial economics
9
371 - Schools & their activities; special education
9
781 - General principles & musical forms
9
297 - Islam, Babism & Bahai Faith
8
301 - Sociology & anthropology
8
340 - Law
8
380 - Commerce, communications & transportation
8
400 - Language
8
200 - Religion
7
659 - Advertising & public relations
7
936 - Europe north & west of Italy to ca. 499
7
550 - Earth sciences
6
more ...