Classification
ACA - Languages, dictionaries - general
ACE - Germanic languages, Indo-Germanic languages
12
YPH - Secretarial work, office management
3
AMA - Education - general
2
ACH - Romance languages
1
ACQ - Oriental languages
1
DNC - Internet
1
EAB - Energy - dictionaries
1
EIA - Solar energy - general
1
YRA - Social studies
1
YZA - Politics, political science
1
ZBAB - Dictionaries
1