Classification
000 - Computer science, information & general works
33
331 - Labor economics
33
500 - Natural sciences & mathematics
23
004 - Data processing & computer science
16
330 - Economics
14
620 - Engineering & allied operations
12
384 - Communications; telecommunication
8
658 - General management
5
005 - Computer programming, programs & data
3
011 - Bibliographies
1
338 - Production
1