T

T - Transmitter
TACEVAL - Tactical Evaluation
TADU - Target Aircraft Development Unit/Training Aids Development Unit
TAF - Tactical Air Force
TAFSU - Tactical Air Force Support Unit
TAG - Telegraphist Air Gunner (Fleet Air Arm)
TAMU - Transport Aircraft Maintenance/Modification Unit
TARU - Transport Aircraft Repair Unit
TB - Torpedo Bomber
TBF - Torpedo Bomber Fighter
TBS - Torpedo & Bombing School
TC - Training Command (Later Transport Command)
TCAEU - Transport Command Aircrew Examining Unit TCASF - Transport Command Air Support Flight
TCBU - Transport Command Base Unit
TCDU/F - Transport Command Development Unit
TCEU - Transport Command Examining Unit
TCFCS - Transport Command Flight Commanders School
TCICU - Transport Command Initial Conversion Unit
TCMF - Transport Command Meteorological Flight
TCNVTS - Transport Command Night Vision Training School
TCPS - Transport Command Practice Flight
TCU - Transport Conversion Unit
TDS - Training Depot Station
TDU/F/S - Torpedo Development Unit/Flight/Section
TDU - Tactical Development Unit
TEE - Test & Evaluation Establishment
TEU - Tactical Exercise Unit
TF - Training Flight/Task Force
TFF - Target Facilities Flight
TFPP - Temporary Ferry Pilots School/ Training Ferry Pilots Pool
TFP - Training Ferry Pool
TQF - The Queens Flight
TFS/F - Target Facilities Squadron
T/F/Sgt. Temporary Flight Sergeant
TFU - Telecommunications Flying Unit - Defford 1941-57
TPS - Test Pilots School
TI - Target Indicator
TI  - Trial Installation
TIMEX  - Time-expired
T/O - Take off
Tourex - Tour-Expired
TPO - Teleprinter Operator
T/R - Transmitter/Receiver
TRE - Telecommunications Research Establishment
Trg - Training
TRS - Tactical Reconnaissance Squadron/Torpedo Refresher School
Tru - Transportable Radar Unit
TS - Training School/Training Squadron
TSCU - Transport Support Conversion Unit
T/Sgnt. - Temporary Sergeant
TSPC - Transport Support Practice Camp
TSR - Torpedo Spotter reconnaissance
TSTU - Transport Support Training Unit
TT - Target Towing
T.T.- Trade Training
TTC - Technical Training Command
TTF - Target Towing Flight/Towed Target Flight/Tanker Training Flight/Torpedo Training Flight/Transport Training Flight
TSTS - Trade Selection Test Section
TT&G - Target Towing & Gunnery
TTS = Torpedo Training School/Squadron
TTU - Torpedo Training Unit/ Target Towing Unit
TU - Training Unit
TURP - Training Unit & Reserve School
TWDU - Tactical weapons Development Unit
T/W/O - Temporary Warrant Officer
TWU - Tactical Weapons Unit

U

U/C Undercarriage
UHF - Ultra High Frequency (radio)
u/i - Unidentified
us - unserviceable
USAAC - United States Army Air corps
USAAF - United States Army Air Force
UAS - University Air Squadron
UED - Universal Equipment Depot
UKADGE - UK Air Defence Ground Environment
UKADR - UK Air Defence Region
UOR - Urgent Operational Requirement
USAAC/F United States Army Air Corpse/Flight
u/t - under training

V

VC - Victoria Cross
VCAS - Vice Chief of the Air Staff
VCR - Valve, Cathode-Ray (cathode-ray tube)
VGS - Volunteer Gliding School
VHF - Very High Frequency (radio)
VISTRE - Visual Inter-service Training & Research Establishment
VOR - VHF Omnidirectional Range (Radio navigation aid)
VOS - Vazdvhoplovna Oficirsva Skola, (Aviation Officers School)
VR - Vazovhoplovna Radionica, (Aviation Repair Workshop)
VTB Vazdvhoplovna-Tehnicki Battalion, (Aviation Technical Battalion)

W

WAAF - Women's Auxiliary Air Force
WACS - West Africa Communication Squadron
WARD - WEstern Aircraft Repair Depot
W/Cdr - Wing Commander
WCAD - War Casualty Accounts Department
WCS - Western Communication Squadron
WDCF/U - Western Desert Communication Flight/Unit
WDU - Wireless Development unit
WEE - Wireless Experimental Establishment
Wef - With Effect From
WEM - Wireless Electrical Mechanic
Wg - Wing
WIDU - Wireless Intelligence Development Unit WL - Wing Leader
W/O - Warrant Officer
WO1 - Warrant Officer First Class
WO2 - Warrant Officer Second Class
W/Op - Wireless Operator
WOp/AG - Wireless Operator/Air Gunner
WOS - Wireless & Observers School/Wireless operators School
WOT1 War Office Type 1 fire tender
WOU - Wireless Operators Unit
WRAF - Women's Royal Air Force
WRAFVR (T) - Women's Royal Air Force Volunteer Reserve (Training branch) (disbanded with WRAF)
WS - Wireless School
WT - Wireless Telegraphy
WTt - Wireless Telephony
WTP - Wireless Testing Park
WTS - Wireless Telephony School/WEapons Training Squadron

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