Classification
004 - Data processing & computer science
301
005 - Computer programming, programs & data
82
006 - Special computer methods
53
621 - Applied physics
34
610 - Medicine & health
30
025 - Library operations
22
371 - Schools & their activities; special education
18
303 - Social processes
16
570 - Life sciences; biology
7
374 - Adult education
5
003 - Systems
4
300 - Social sciences
3
343 - Military, tax, trade & industrial law
2
518 - Numerical analysis
2
351 - Public administration
1
381 - Commerce
1