Classification
004 - Data processing & computer science
258
005 - Computer programming, programs & data
198
006 - Special computer methods
93
621 - Applied physics
69
670 - Manufacturing
43
371 - Schools & their activities; special education
37
303 - Social processes
30
658 - General management
26
003 - Systems
22
025 - Library operations
21
620 - Engineering & allied operations
15
330 - Economics
10
381 - Commerce
8
370 - Education
6
629 - Other branches of engineering
6
518 - Numerical analysis
3
660 - Chemical engineering
3
338 - Production
2
530 - Physics
2
534 - Sound & related vibrations
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
020 - Library & information sciences
1
305 - Social groups
1
333 - Economics of land & energy
1
343 - Military, tax, trade & industrial law
1
363 - Other social problems & services
1
364 - Criminology
1
374 - Adult education
1
509 - Historical, geographic & persons treatment
1
515 - Analysis
1
547 - Organic chemistry
1
551 - Geology, hydrology & meteorology
1
616 - Diseases
1