Classification
004 - Data processing & computer science
120
005 - Computer programming, programs & data
118
006 - Special computer methods
113
621 - Applied physics
26
003 - Systems
11
025 - Library operations
10
570 - Life sciences; biology
8
323 - Civil & political rights
4
610 - Medicine & health
3
371 - Schools & their activities; special education
2
910 - Geography & travel
2
001 - Knowledge
1
343 - Military, tax, trade & industrial law
1
381 - Commerce
1
500 - Natural sciences & mathematics
1
518 - Numerical analysis
1
519 - Probabilities & applied mathematics
1
520 - Astronomy & allied sciences
1
629 - Other branches of engineering
1
650 - Management & auxiliary services
1