T ~ Tailor

T ~ Temporary

T ~ Training Centre (Ministry of Munitions)

T & S ~ Transport & Supply

TA ~ Territorial Army

TABAC ~ Third Army Back Area Commandant

TANS ~ Territorial Army Nursing Service

TAT ~ Temporary Ambulance Train

TB ~ Temporary Base (medical)

TC ~ Tank Corps

TCC ~ Telegraph Construction Company

TCO ~ Train Conducting Officer

TCP ~ Telegraph Construction Company

TD ~ Tent Detachment

TD ~ Territorial Decoration

TD ~ Transport Driver

TDO ~ Telephone Dugout

TEE ~ Tyne Electrical Engineers

tel ~ Telegraph

TF ~ Tool Factory (Ministry of Munitions)

TF ~ Territorial Force

TF ~ Train Ferry

TFNS ~ Territorial Force Nursing Service

TG ~ Town Guards (South Africa)

TLO ~ Train Loading Officer

TM ~ Trench Mortar

TM ~ Trench Munitions

TMB ~ Trench Mortar Battery

TMBAIF ~ Trench Mortar Battery Australian Imperial Force

TNT ~ Trinitrotoluene

TO ~ Transport Officer

TOS ~ Taken on Strength

Tp ~ Troop

TPO ~ Travelling Post Office

Tpr ~ Trooper

TR ~ Training Reserve

TRB ~ Training Reserve Brigade

TSD ~ Timber Supply Department

TSM ~ Troop Sergeant-Major (cavalry)

TTD ~ Transportation Troops Department

TWD ~ Trench Warfare Department

TWFS ~ Trench Warfare Filling Station (Ministry of Munitions)

TWRB ~ Trench Warfare Research Branch

TWRD ~ Trench Warfare Research Department

TWS ~ Trench Warfare Store (Ministry of Munitions)

TWSD ~ Trench Warfare Supplies Department