| Acronyms | Meaning / Significance |
Source |
| T | Transport | |
| T&TE | Tools and Test Equipment | |
| T-Series | Terminal Equipment and Transmission for Facsimile Services | ITU-T recommendation |
| TA | Target Architecture | |
| TA | Terminal Adapter | ITU-T I-Series recommendations |
| TA | Transport Area | |
| TAA | tactical assembly area | |
| TAASO | terminal area ADP staff officer | |
| TAC | ||
| TACA | Tactical Air Activity | |
| TACE | Type A Cost Estimate | |
| TACOM | Tactical Command | |
| TACON | Tactical Control | |
| TACP | Tactical Air Control Party | |
| TACS | Tactical Air Control System | |
| TACS | theatre air control squadron | Ex Strong Resolve 95 |
| TAD | tactical air directive | |
| TADIL | Tactical Data Information Link | |
| TADOC | tactical air defence operation centre | |
| TADPOLE | tactical crypto equipment for land, maritime and air forces | |
| TAFICS | Turkish Armed Forces Integrated Communication System | |
| TAIS | target architecture and implementation strategy | |
| TAMARI | ||
| TAO | Transfer of Authority | |
| TAOC | Transportable Air Operations Centre | CP 9B3020 |
| TAOC | tactical air operations centre | |
| TAR | tactical air reconnaisance | |
| TAR | Terminal Area Radar | |
| TARE | Telegraph Automatic Relay Equipment | |
| TARFLAD | tactical radio relay frequency planning document | |
| TARIN | tactical air request / information network | |
| TARM | tactical anti-radiation missile | |
| TARN | tactical air request net | |
| TAS | training access switch | |
| TAS | True Airspeed | |
| TASM | tactical air-to-surface missile | |
| TASMO | Tactical Air Support of Maritime Operations | |
| TASS | tactical automated switching system | |
| TAT | tactical air transport | |
| TAV | Target Architecture Version | |
| TBCE | Type B Cost Estimate | |
| TBD | To Be Defined/Determined | |
| TBM | Tactical Ballistic Missile | |
| TBM | tactical ballistic missile | |
| TBMF | Tactical Battle Management Functions | |
| TC | task coordinator | STC CSNI final report 22/9/95 |
| TC | Transaction Capabilities | |
| TCA | Time Critical Application | |
| TCAS | Trafic Alert and Collision Avoidance System | |
| TCB | trusted computer base | |
| TCB | Trusted Computing Base | |
| TCCE | Type C Cost Estimate | |
| TCDS | TCF and Circuit Database System | |
| TCF | Technical Control Facility | |
| TCG | technical coordination group | STC CSNI final report 22/9/95 |
| TCIS | technical common interoperability standard | |
| TCN | Troop Contributing Nation | |
| TCP | Transmission Control Protocol | IETF |
| TCP/IP | TCP / Internet Protocol | IETF |
| TCS | traffic content security | |
| TCS | Trusted Communications Sublayer | |
| TCSEC | NATO trusted computer systems evaluation criteria | |
| TDA | Tactical Decision Aid | |
| TDG | tactical data generator | STC CSNI final report 22/9/95 |
| TDI | trusted database interpretation | |
| TDHS | Tactical Data Handling System | |
| TDM | Time Division Multiplexer | STC CSNI final report 22/9/95 |
| TDMA | Time-division Multiple-Access | |
| TDP | Technical Data Package | |
| TDS | Technical Data System | |
| TDS | temporary dgradation of service | |
| TDS | Test and Development Sector | |
| TDX | terminal data exchange | |
| TDY | temporary duty | |
| TE | Terminal Equipment | |
| TE | Test Edition | |
| TEK | traffic encryption key | |
| TEMPEST | temporary emanation and spurious transmission | ADatP-2 |
| TF | Task Force | |
| TFA | Traffic Flow Analysis | |
| TFA | transparent file access | |
| TFC | tactical fusion centre | |
| TFS | Traffic Flow Security | |
| TG | Task Group | |
| TGTS | Target Information System | |
| THN | Territorial Host Nation | |
| TID | Touch Input Device | |
| TIDHS | tactical intelligence data handling system | |
| TIES | technical information exchange service | |
| TIFF | ACE ACCIS core cap specs | |
| TIP | transition implementation plan | NRC/3-N(95)66 |
| TIS | Tactical Informatio system | |
| TIS | temporary interruption of service | |
| TIS | Traffic Information Service | |
| TIS | trusted information system | |
| TISFASS | target information and force allocation support system | |
| TL | Transport Layer | |
| TLCA | top level certification authority | AC/317-N/846 |
| TLDD | Top Level Detailed Design | |
| TLE | Treaty Limited Equipment | |
| TLN | transportable local network | |
| TLO | telecommunications liaison officer | |
| TLSP | transport layer security protocol | |
| TLSP | Truck loading station | |
| TM | technical memorandum | |
| TM | Transmission Media | |
| TMA | Terminal Area | |
| TMAT | transition management advisory team | NRC/3-N(95)55 |
| TMD | Theatre Missile Defence | |
| TMEG | trusted MLS e-mail guard | |
| TMG | Technical Management Group (FR,GE,IT,UK) | |
| TMMS | Target Mission Report (MISREP) Monitoring System | |
| TMN | telecommunications management network | |
| TMRR | Temporary Minimum Risk Route | |
| TMT | technical management team | |
| TN | technical note | |
| TN | Telephone Network | |
| TNBSVT | Tactical Narrow-Band Secure Voice Terminal | |
| TNF | Theatre Nuclear Forces | |
| TNFC2 | TNF Command and Control | |
| TNI | trusted network interpretation | |
| TO&E | Table of Organization and Equipment | |
| TOA | time of arrival | |
| TOA | Transfer Of Authority | |
| TOC | tactical operation centre | |
| ToI | Transponder of Interest | |
| TOP | Technical and Office Protocol | |
| TOR | Terms Of Reference | |
| TOSCA | Tote System Computer Assisted | |
| TOT | time over target | |
| TP | Transaction Processing | |
| TP | Transport Protocol | IETF |
| TPB | test patch board | |
| TPC | Technology Planning Center | |
| TPN | tactical packet network | |
| TPSS | Target Prioritisation and Selection | |
| TPT | Transition Planning Team | ADSIA(ADP)-C-007-96 |
| TR | Technical Report | |
| TRACSVAN | transportable RADAR and communications jammer and simulation van | MEWSG |
| TRANSEC | TRANsmission SECurity | |
| TRD | technical requirement document | |
| TREE | Transient Radiation Effects on Electronics | |
| TRM | transmission resource management | |
| TROL | tapeless rotor less on line | crypto |
| TRS | Total Requirement Statement | |
| TS | Training Section | |
| TS | Transport Service | |
| TSAP | Transport Service Access Point | |
| TSCTR | Transportable SCTR | AC/317/SEC/95/47 |
| TSGAO | Tri-NMCs Steering Group on Air Operations | |
| TSGCE | Tri-service group on communications and electronics | Functions assumed by NC3B |
| TSGT | Transportable Satellite Ground Terminal | |
| TSGTS | transportable satellite ground terminal station | AC/317(WG/1)(SG/2)N/183 |
| TSIU | time slot interface unit | |
| TSMP | technical supervisory and maintenance position | |
| TSMS | Tactical Spectrum Management System | |
| TSP | telecommunications service priority | |
| TSP | Tornado Self-Protection Jammer | |
| TSV | transmission security violation | |
| TTBT | Threshold Test Ban Treaty | 1974 |
| TTCN | Tree and Tabular Combined Notation | |
| TTM | Tactical Target Materials | |
| TTW | Transition To War | |
| TTW | time of tension or war | |
| TTX | Teletex Terminal | |
| TTY | Teletype | |
| TUL | TARE User List | |
| TUP | Telephone User Part | |
| TVI | Time Validity Interval | |
| TWE | Threat Warning Equipment | |
| TWG | Transition Working Group | |
| TWS | Technical Watch Supervisor | |
| TCAS | traffic alert and collision avoidance system | NASA |