Classification
005 - Computer programming, programs & data
20
000 - Computer science, information & general works
11
004 - Data processing & computer science
8
331 - Labor economics
3
500 - Natural sciences & mathematics
3
621 - Applied physics
3
658 - General management
2
158 - Applied psychology
1
330 - Economics
1
343 - Military, tax, trade & industrial law
1
604 - Special topics
1
620 - Engineering & allied operations
1