What does DAO stand for?

Coastal Skiffs, Swansboro, NC - Manufacturer code for watercraft hull identification number (USCG)

Daai Chin - Language code (ETLW)

Daallo Airlines - Djibouti - FAA designator (FAAC)

Danton - NCIC firearms make code (NCIC)

Data Access Objects - Microsoft Corp.

Data Assimilation Office (SAUS)

Data Automation Officer - Air Force

Database Access Objects - An interface for database access (ESKOM)

Dayton Area Office - Energy Research and Development Administration

Deasphalted Oil - Petroleum refining

Defense Accounting Office - Military technology (DDF)

Defense Administration Office (SAUS)

Defense Attache Office (AFM)

Department Administrative Order - Department of Commerce (NOAA)

Departmental Administrative Order (SAUO)

Destination Address Omitted - Computer science (VERA)

Dial Assist Operator (CET)

Diamine Oxidase - Also, DO - An enzyme

Directory Assistance Only (TELEC)

Directory Assistance Operator

Directory of Amateur Observers (SAUS)

Disability Adviser's Officer (South Australia) - Medicine

Disc at once (SAUS)

Disk-At-Once (SAUS)

District Accounting Office - or Officer - Navy

District Adjudications Officer (SAUS)

District Advisory Officer (SAUS)

District Aviation Office - or Officer - Navy

Division Air Officer

Divisional Agricultural Officer - Ministry of Agriculture, Fisheries, and Food - British

Division Ammunition Office - or Officer - Army

Doctor of Art of Oratory

Dominion Astronomical Observatory (TLAA)

Dominion Astrophysical Observatory (SAUO)

Dorsal Accessory Olive - Neuroanatomy

Double Action Only - Gun (GOBB)

Duly Authorized Officer

Fort Huachuca, AZ - Location identifier - FAA (FAAL)