D of A Director of Artillery
D Rlys Director of Railways
DA & QMG Deputy Adjutant and Quartermaster General
DAA Director of Army Accounts
DAAG Deputy Assistant Adjutant General
DACG Deputy Assistant Chaplain General
DAD Roads Deputy Assistant Director of Roads
DAD Sigs Deputy Assistant Director of Signals
DADAPS Deputy Assistant Director Army Postal Services
DADGR&E Deputy Assistant Director of Graves Registration and Enquires
DADGT Deputy Assistant Director-General of Transportation
DADL Deputy Assistant Director of Labour
DADMS Deputy Assistant Director Medical Services
DADOS Deputy Assistant Director Ordnance Services
DADPS Deputy Assistant Director Postal Services
DADRT Deputy Assistant Director Railway Traffic
DADS Deputy Assistant Director Supplies
DADT Deputy Assistant Director Transport
DADW Deputy Assistant Director of Works
DAG Deputy Adjutant General
DAH disorderly action of the heart (seen in medical records)
DAMS Deputy Assistant Military Secretary
DAP Divisional Ammunition Park
DAPC Deputy Assistant Principal Chaplain
DAPS Director of Army Postal Services
DAQMG Deputy Assistant Quartermaster General
DBC Director of Barrack Construction
DCIGS Deputy Chief of the Imperial General Staff
DCMDistinguished Conduct Medal awarded
DD S and T Deputy Director Supplies and Transport
DD Sigs Deputy Director of Signals
DDAPS Deputy Director of Army Postal Services
DDGMR Deputy Director-General Military Railways or Movements and Railways
DDGT Deputy Director-General of Transportation
DDIWT Deputy Director Inland Waterway Transport
DDMS Deputy Director Medical Services
DDOS Deputy Director Ordnance Services
DDRT Deputy Director Railway Traffic
DDTN Deputy Director of Transportation
DDVS Deputy Director Veterinary Services
DDW Deputy Director of Works
DEOS Director of Equipment and Ordnance Stores
DFC Distinguished Flying Cross
DFS Director of Financial Services
DFW Director of Fortifications and Works
DGAMS Director-General, Army Medical Services
DGAVS Director-General, Army Veterinary Services
DGNS Director-General National Service
DGO Divisional Gas Officer
DGTF Director-General of the Territorial Force
DIWD Director Inland Waterways and Docks
DIY Derbyshire Imperial Yeomanry
DLR Director of Light Railways
DM Director of Mobilisation
DMO Director of Military Operations
DMS Director of Medical Services, also Deputy Military Secretary
DMT Director of Military Training
DNTO Divisional Naval Transport Officer
DonkeyDonkey man part of a ships crew
DORA Defence of the Realm Act
DORE District Office Royal Engineers
DOS Director of Ordnance Services
DPS Director of Personal Services
DPW Director of Prisoners of War
DQMG Deputy Quartermaster-General
DRF Depression Range-Finder
DRG&E Director of Graves Registration and Enquires
DRLS Despatch Rider Letter Service
DRO Director of Recruiting and Organisation
DRT Director Railway Traffic
DSC Distinguished Service Cross (a naval decoration)
DSD Director of Staff Duties
DSM Distinguished Service Medal (a naval decoration)
DSO Distinguished Service Order
DSQ Director of Supplies and Quartering
DTM Director of Transport and Movements
DTMO Divisional Trench Mortar Officer
DTN Director of Transportation