Classification
005 - Computer programming, programs & data
004 - Data processing & computer science
168
003 - Systems
10
500 - Natural sciences & mathematics
8
331 - Labor economics
7
374 - Adult education
3
620 - Engineering & allied operations
3
001 - Knowledge
1
323 - Civil & political rights
1
330 - Economics
1
384 - Communications; telecommunication
1