Data Assimilation Office 
Data Access Objects 
Defense Attache Office 
Defense Accounting Office 
Directory Assistance Operator 
division ammunition officer 
Dominion Astrophysical Observatory 
Data Access Object 
Department/Agency/Organization 
Data Administration Office 
Defense Attaché Office 
defense attaché officer 
Deputy Adjudications Officer 
District Adjudication Officer 
Daallo Airlines 
Damage Assessment Officer 
D-amino acid oxidase 
Data Assimilation Office's 
Dayton Area Office 
Defence Acquisition Organisation 
Defense Administration Office 
Defense Agency Operations 
Defense Attache's Office 
Department Adjutant Oscillator 
Department Administrative Order 
descending aorta 
Designated Agency Official 
Destination Address Omitted 
diamine oxidase 
diaminoxidase