| VO | Space Vehicle Operations | In English | |
| VOIR | Venus Orbiting Imaging Radar | In English | → Astronomy |
| VPLCC | Vehicle Propellant Loading Control Center | In English | |
| VRM | Venus Radar Mapper | In English | → Astronomy |
| VSTAG | Vandenberg Shuttle Turnaround Analysis Group | In English | |
| VSTAR | Vandenberg Shuttle Turnaround Assessment Report | In English | |
| VTF | Vertical Test Flight | In English | |
| VTS | Vandenberg Tracking Station | In English | |
| WCSAR | Wisconsin Center for Space Automation and Robotics | In English | → Mechanical engineering → Electronics |
| WLS | Western Launch Site | In English | |
| WSMC | Western Space and Missile Center | In English | → Military engineering |
| WSMCR | Western Space and Missile Center Range | In English | → Military engineering |
| WSMCR | Western Space and Missile Center Regulation | In English | → Military engineering |
| WUSCI | Western Union Space Communications, Incorporated | In English | → Telecommunications |
| ZFlu | Zeitschrift fur Flugwissenschaften | In German | → Serial publications, periodicals |
| ZFlWe | Zeitschrift fur Flugwissenschaften und Weltraumforschung | In German | → Serial publications, periodicals |
| НЛО | Неидентифициран летящ обект = OVNI | Objet Volant Non Identifié | In French = OVNI | Objecte Volador No Identificat | In Catalan = OVNI | Objeto Volador No Identificado | In Spanish = UFO | Unidentifiziertes Flugobjekt | In German = UFO | Unidentified Flying Object | In English = UFO | Unknown Flying Object | In English = UFO | Uidentificeret flyvende objekt | In Danish = NIFO | Neidentigita Fluganta Objekto | In Esperanto = UFO | Unbekend fleanend objekt | In Frisian = עב"מ | עצם בלתי מזוהה | In Hebrew = OVNI | Oggetto Volante Non Identificato | In Italian = NLO | Neidentificēts lidojošs objekts | In Latvian = UFO | Uidentifisert flygende objekt | In Norwegian = UFO | Uidentifisert flygande objekt | In Nynorsk = NOL | Niezidentyfikowany Obiekt Latający | In Polish = OVNI | Objeto Voador Não Identificado | In Portuguese = OZN | Obiect Zburător Neidentificat | In Romanian = НЛО | Неопознанный летающий объект | In Russian = NLO | Neidentifikovani leteći objekat | In Serbo-Croatian |
In Bulgarian | |
| НЛО | Неопознанный летающий объект = OVNI, UFO, NIFO, עב"מ, NLO, NOL, OZN (look above) |
In Russian | |
| עב"מ | עצם בלתי מזוהה = НЛО, OVNI, UFO, NIFO, עב"מ, NLO, NOL, OZN (look above) |
In Hebrew |