Classification
331 - Labor economics
384 - Communications; telecommunication
005 - Computer programming, programs & data
10
500 - Natural sciences & mathematics
5
620 - Engineering & allied operations
3
000 - Computer science, information & general works
2
004 - Data processing & computer science
2
745 - Decorative arts
2
011 - Bibliographies
1
330 - Economics
1
338 - Production
1
374 - Adult education
1
658 - General management
1