defence order
• Finance deferred ordinary (shares)
• Diploma in Ophthalmology
• Diploma in Osteopathy
• (or d.o.) Grammar direct object
• (or D/O) Commerce direct order
• dissolved oxygen
• district office (or officer)
• divisional office (or officer)
• Doctor of Optometry
• Doctor of Oratory
• Doctor of Osteopathy
• British fishing port registration for Douglas
• drawing office
• British vehicle registration for Lincoln