Deputy Director for Operations
Deputy Director of Operations
Deputy Director Operations
Discrete Digital Output
Dynamic Drive Overlay
David Dunlap Observatory
Decline Definite Offer
Defensive Duty Officer
Deferred Drawdown Option
Denial Decision Object
Deputy Duty Officer
design drawing office
Designated Detention Officer
Despatch discharging only
Diploma in Dental Orthopaedics
Direct Dial Overseas
Direct Dialing Outgoing
Direct Dialing Overseas
Direct Draw Overlay
Directorate of Operations
Discrete Data Output
Disk Drive Overlay
Divisional Duty Officer
Drawing and Disbursing Officer
Dynamic Data Object