| NUDET | Nuclear Detonation | In English | → Nuclear technology |
| NUDTJ | National University Defense Technology Journal | In English | → Serial publications, periodicals |
| NWE | Nuclear Weapons Effect | In English | → Nuclear technology |
| NWMP | Nuclear Weapons Monitor Plan | In English | → Nuclear technology |
| OCRTAEMS | Office Central pour la Répression du Trafic des Armes, des munitions, des produits Explosifs et des Matières Sensibles | In French | → Police |
| OIAC | Organisation pour l'Interdiction des Armes Chimiques (www.opcw.org) = OPWC | Organisation for the Prohibition of Chemical Weapons | In English |
In French | → Organizations and associations → International relations |
| ONR | Office of Naval Research | In English | |
| OPWC | Organisation for the Prohibition of Chemical Weapons (www.opcw.org) = OIAC (look above) |
In English | → Organizations and associations → International relations |
| OSD | Office of the Secretary of Defense | In English | → 355 |
| OT | Organisation Todt | In French | → History |
| PBW | Particle-Beam Weapon | In English | |
| PCPAS | Patriot Command Post Automation System | In English | |
| PIE | Pistolet à Impulsions Électroniques | In French | |
| PLAGE | Plattform gegen Atomgefahren | In German | → Organizations and associations → Nuclear technology |
| PMR | Pacific Missile Range | In English | |
| RAWS | Role-Adaptable Weapons System | In English | |
| RNEP | Robust Nuclear Earth Penetrator | In English | → Nuclear technology |
| RRA | Rock River Arms (www.rockriverarms.com) | In English | → Mechanical engineering |
| RRW | Reliable Replacement Warhead | In English | |
| S&MST | Space and Missile System Test | In English | → Spaceflight engineering, astronautics |
| SABIR | Space-Based Interceptor | In English | → Spaceflight engineering, astronautics |
| SAL | Strategic Arms Limitation | In English | → International relations |
| SAM | Surface-To-Air Missile | In English | |
| SAMTEC | Space And Missile Test Center | In English | → Spaceflight engineering, astronautics |
| SAMTO | Space And Missile Test Organization | In English | → Spaceflight engineering, astronautics |
| SBDEW | Space-Based, Directed-Energy Weapon | In English | → Spaceflight engineering, astronautics |
| SBDEWSIM | Space-Based, Directed-Energy Weapon Simulation | In English | → Spaceflight engineering, astronautics |
| SBKEW | Space-Based Kinetic-Energy Weapon | In English | → Spaceflight engineering, astronautics |
| SBKEWS | Space-Based Kinetic-Energy Weapon System | In English | → Spaceflight engineering, astronautics |
| SBKKV | Space-Based Kinetic Kill Vehicle | In English | → Spaceflight engineering, astronautics |
| SBKKVWS | Space-Based Kinetic Kill Vehicle Weapon System | In English | → Spaceflight engineering, astronautics |
| SBL | Space-Based Laser | In English | → Spaceflight engineering, astronautics |
| SBLIP | Space-Based Laser Intercept Program | In English | → Spaceflight engineering, astronautics |
| SBM | Strategic Ballistic Missile | In English | |
| SBMS | Space-Based Battle Manager Satellite | In English | → Spaceflight engineering, astronautics |
| SBMS | Spaceborne Battle Management Satellite | In English | → Spaceflight engineering, astronautics |
| SBNWS | Seal Beach Naval Weapons Station | In English | |
| SD&EOSD | Strategic Defense and Electro-Optics Systems | In English | → Electrical engineering |
| SDIO | Strategic Defense Initiative Organization | In English | → Organizations and associations → 355 |
| SDP | Strategic Defense Program | In English | → 355 |
| SDS | Space Defense System | In English | → Spaceflight engineering, astronautics |
| SDS | Strategic Defense System | In English | |
| SEMWS | Survivable, Endurable Missile Warning System | In English | → 355 |
| SICBM | Small Intercontinental Ballistic Missile | In English | |
| SLAT | Supersonic Low-Altitude Target | In English | → Aeronautics, aircraft |
| SLATM | Supersonic Low-Altitude Target Missile | In English | |
| SLBM | Submarine-Launched Ballistic Missile | In English | |
| SLCM | Sea-Launched Cruise Missile | In English | |
| SM | Strategic Missile | In English | |
| SMSA | Strategic Missile Support Area | In English | |
| SMSB | Strategic Missile Support Base | In English | |
| SMSS | Survivable Missile Surveillance System | In English | |
| SMT | Small Missile Telecamera | In English | |
| SMW | Strategic Missile Wing | In English | |
| SNA | Sous-marin Nucléraire d'Attaque | In French | → Nuclear technology |
| SNLE | Sous-marin Nucléaire Lanceur d'Engins | In French | → Nuclear technology |
| SODSIM | Strategic Offense-Defense Simulation | In English | → 355 |
| SPADATS | Space Defense Acquisition and Tracking System | In English | → Spaceflight engineering, astronautics |
| SPADCCS | Space Defense Command and Control System | In English | → Spaceflight engineering, astronautics |
| SPADE | Space Acquisition Defense Experiment | In English | → Spaceflight engineering, astronautics |
| SPADOC | Space Defense Operations Center | In English | → Spaceflight engineering, astronautics |
| SRAM | Short-Range Attack Missile | In English | |
| SSBN | Fleet Ballistic Missile Submarine | In English | |
| STC | SHAPE (Supreme Headquarters Allied Powers Europe) Technical Center | In English | |
| STM | Systems Test Missile | In English | |
| STRADEM | Strategic Defense Effectiveness Model | In English | → 355 |
| TBM | Tactical Ballistic Missile | In English | |
| TICE | Traité d'Interdiction Complète des Essais nucléaires | In French | → International relations → Nuclear technology |
| TNP | Traité de Non Prolifération des armes nucléaires | In French | → International relations → Nuclear technology |
| TNT | Trinitrotolueen = TNT | Trinitrotoluol | In German = TNT | Trinitrotoluè | In Catalan = TNT | Trinitrotoluen | In Czech = TNT | Trinitrotoluene | In English = TNT | Trinitrotolueno | In Esperanto = TNT | Trinitrotolueno | In Spanish = TNT | Trinitrotoluenori | In Basque = TNT | ترینیتروتولوئن | In Persian = TNT | Trinitrotoluène | In French = TNT | Trinitrotoluene | In Italian = TNT | Trinitrotoluolas | In Lithuanian = TNT | Trinitrotoluen | In Nynorsk = TNT | Trinitrotoluen | In Norwegian = TNT | Trinitrotolueno | In Portuguese = TNT | Trinitrotoluen | In Romanian = TNT | Тринитротолуол | In Russian = TNT | Trinitrotoluen | In Slovenian = ТНТ | Тринитротоулен | In Serbian = TNT | ทีเอ็นที | In Thai = TNT | Trinitrotoluen | In Turkish = ТНТ | Тринітротолуол | In Ukrainian |
In Dutch | → Chemicals |
| TNT | Trinitrotoluolas = ТНТ (look above) |
In Lithuanian | → Chemicals |
| TNT | Trinitrotoluene = ТНТ (look above) |
In Italian | → Chemicals |
| TNT | Trinitrotoluène = ТНТ (look above) |
In French | → Chemicals |
| TNT | ترینیتروتولوئن = ТНТ (look above) |
In Persian | → Chemicals |
| TNT | Trinitrotoluen = ТНТ (look above) |
In Norwegian | → Chemicals |
| TNT | Trinitrotoluen = ТНТ (look above) |
In Nynorsk | → Chemicals |
| TNT | Trinitrotoluen = ТНТ (look above) |
In Turkish | → Chemicals |
| TNT | ทีเอ็นที = ТНТ (look above) |
In Thai | → Chemicals |
| TNT | Trinitrotoluen = ТНТ (look above) |
In Slovenian | → Chemicals |
| TNT | Тринитротолуол = ТНТ (look above) |
In Russian | → Chemicals |
| TNT | Trinitrotolueno = ТНТ (look above) |
In Portuguese | → Chemicals |
| TNT | Trinitrotolueno = ТНТ (look above) |
In Spanish | → Chemicals |
| TNT | Trinitrotolueno = ТНТ (look above) |
In Esperanto | → Chemicals |
| TNT | Trinitrotoluene = ТНТ (look above) |
In English | → Chemicals |
| TNT | Trinitrotoluen = ТНТ (look above) |
In Romanian | → Chemicals |
| TNT | Trinitrotoluenori = ТНТ (look above) |
In Basque | → Chemicals |
| TNT | Trinitrotoluol = ТНТ (look above) |
In German | → Chemicals |
| TNT | Trinitrotoluè = ТНТ (look above) |
In Catalan | → Chemicals |
| TNT | Trinitrotoluen = ТНТ (look above) |
In Czech | → Chemicals |
| TW/AA | Tactical Warning/Attack Assessment | In English | → 355 |
| UNIDIR | United Nations Institute for Disarmament Research (www.unidir.org) | In English | → United Nations → Polemology |
| USASDG | United States Army Space Defense Group | In English | → 355 623n → Spaceflight engineering, astronautics |
| VAB | Véhicule de l'Avant Blindé | In French | → Automobile manufacturing |
| VOA | Véhicule d'Observation de l'Artillerie | In French | → Automobile manufacturing |
| WCP | Weapon Control Platform | In English | |
| WEAG | Western European Armaments Group | In English | → Organizations and associations |
| WEAO | Western European Armaments Organisation = GAEO | Groupe Armement de l'Europe Occidentale | In French |
In English | → Organizations and associations |
| WP | Weapons Platform | In English | |
| WSMC | Western Space and Missile Center | In English | → Spaceflight engineering, astronautics |
| WSMCR | Western Space and Missile Center Range | In English | → Spaceflight engineering, astronautics |
| WSMCR | Western Space and Missile Center Regulation | In English | → Spaceflight engineering, astronautics |
| WSMR | White Sands Missile Range | In English | |
| WSPR | Weapon System Problem Report | In English | |
| WSTA | Weapon System Testability Analyzer | In English | |
| WSV | Weapon System Vehicle | In English | → Vehicle engineering |
| WWMCCS | Worldwide Military Command and Control System | In English | → 355 |
| ТНТ | Тринітротолуол = TNT (look above) |
In Ukrainian | → Chemicals |
| ТНТ | Тринитротоулен = TNT (look above) |
In Serbian | → Chemicals |