Classification
621 - Applied physics
243
384 - Communications; telecommunication
148
004 - Data processing & computer science
75
620 - Engineering & allied operations
45
331 - Labor economics
31
006 - Special computer methods
27
005 - Computer programming, programs & data
23
658 - General management
20
500 - Natural sciences & mathematics
11
338 - Production
10
745 - Decorative arts
10
330 - Economics
9
371 - Schools & their activities; special education
7
000 - Computer science, information & general works
6
381 - Commerce
6
364 - Criminology
5
629 - Other branches of engineering
5
302 - Social interaction
4
300 - Social sciences
3
303 - Social processes
2
363 - Other social problems & services
2
523 - Specific celestial bodies & phenomena
2
535 - Light & infrared & ultraviolet phenomena
2
610 - Medicine & health
2
001 - Knowledge
1
020 - Library & information sciences
1
307 - Communities
1
323 - Civil & political rights
1
333 - Economics of land & energy
1
343 - Military, tax, trade & industrial law
1
346 - Private law
1
515 - Analysis
1
551 - Geology, hydrology & meteorology
1
624 - Civil engineering
1
662 - Explosives, fuels & related products
1
670 - Manufacturing
1
720 - Architecture
1