WAAC ~ Women's Auxiliary Army Corps

WD ~ War Department

WE ~ War Establishment

WAFF ~ West African Field Force

WG ~ Welsh Guards

WIA ~ Wounded in Action

WIR ~ West India Regiment

WLA ~ Women's Land Army

WO ~ War Office

WO ~ Warrant Officer

WOE & M ~ Works Officer, Electrical & Mechanical

WPC ~ War Priorities Committee

WPMR ~ Western Province Mounted Rifles (South Africa)

WRC ~ War Railway Council

WSPU ~ Women's Social & Political Union (suffragettes)

WT ~ Wireless Telegraphy

WW ~ Walking Wounded

WWCS ~ Walking Wounded Collecting Station